diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index ec5acf43b..dfa783927 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -131,7 +131,7 @@ void PrintConfigDef::init_fff_params()
                    "as [layer_num] and [layer_z].");
     def->multiline = true;
     def->full_width = true;
-    def->height = 50;
+    def->height = 5;
     def->mode = comExpert;
     def->default_value = new ConfigOptionString("");
 
@@ -140,7 +140,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("This code is inserted between objects when using sequential printing. By default extruder and bed temperature are reset using non-wait command; however if M104, M109, M140 or M190 are detected in this custom code, Slic3r will not add temperature commands. Note that you can use placeholder variables for all Slic3r settings, so you can put a \"M109 S[first_layer_temperature]\" command wherever you want.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 120;
+    def->height = 12;
     def->mode = comExpert;
     def->default_value = new ConfigOptionString("");
 
@@ -360,7 +360,7 @@ void PrintConfigDef::init_fff_params()
                    "Note that you can use placeholder variables for all Slic3r settings.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 120;
+    def->height = 12;
     def->mode = comExpert;
     def->default_value = new ConfigOptionString("M104 S0 ; turn off temperature\nG28 X0  ; home X axis\nM84     ; disable motors\n");
 
@@ -539,7 +539,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("If layer print time is estimated below this number of seconds, fan will be enabled "
                    "and its speed will be calculated by interpolating the minimum and maximum speeds.");
     def->sidetext = L("approximate seconds");
-    def->width = 60;
+    def->width = 6;
     def->min = 0;
     def->max = 1000;
     def->mode = comExpert;
@@ -556,7 +556,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("You can put your notes regarding the filament here.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 130;
+    def->height = 13;
     def->mode = comAdvanced;
     def->default_value = new ConfigOptionStrings { "" };
 
@@ -1007,7 +1007,7 @@ void PrintConfigDef::init_fff_params()
     def->label = L("Inherits profile");
     def->tooltip = L("Name of the profile, from which this profile inherits.");
     def->full_width = true;
-    def->height = 50;
+    def->height = 5;
     def->default_value = new ConfigOptionString();
     def->cli = ConfigOptionDef::nocli;
 
@@ -1034,7 +1034,7 @@ void PrintConfigDef::init_fff_params()
     def->cli = "after-layer-gcode|layer-gcode";
     def->multiline = true;
     def->full_width = true;
-    def->height = 50;
+    def->height = 5;
     def->mode = comExpert;
     def->default_value = new ConfigOptionString("");
 
@@ -1053,7 +1053,7 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
 	def->default_value = new ConfigOptionBool(true);
 
-	const int machine_limits_opt_width = 70;
+	const int machine_limits_opt_width = 7;
 	{
 		struct AxisDefault {
 			std::string         name;
@@ -1252,7 +1252,7 @@ void PrintConfigDef::init_fff_params()
                    "header comments.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 130;
+    def->height = 13;
     def->mode = comAdvanced;
     def->default_value = new ConfigOptionString("");
 
@@ -1387,7 +1387,7 @@ void PrintConfigDef::init_fff_params()
     def->gui_flags = "serialized";
     def->multiline = true;
     def->full_width = true;
-	def->height = 60;
+	def->height = 6;
     def->mode = comExpert;
 	def->default_value = new ConfigOptionStrings();
 
@@ -1402,7 +1402,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("You can put your notes regarding the printer here.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 130;
+    def->height = 13;
     def->mode = comAdvanced;
     def->default_value = new ConfigOptionString("");
 
@@ -1589,7 +1589,7 @@ void PrintConfigDef::init_fff_params()
     def->label = "";
     def->full_label = L("Serial port");
     def->tooltip = L("USB/serial port for printer connection.");
-    def->width = 200;
+    def->width = 20;
     def->default_value = new ConfigOptionString("");
 
     def = this->add("serial_speed", coInt);
@@ -1635,7 +1635,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("If layer print time is estimated below this number of seconds, print moves "
                    "speed will be scaled down to extend duration to this value.");
     def->sidetext = L("approximate seconds");
-    def->width = 60;
+    def->width = 6;
     def->min = 0;
     def->max = 1000;
     def->mode = comExpert;
@@ -1742,7 +1742,7 @@ void PrintConfigDef::init_fff_params()
                    "a \"M109 S[first_layer_temperature]\" command wherever you want.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 120;
+    def->height = 12;
     def->mode = comExpert;
     def->default_value = new ConfigOptionString("G28 ; home all axes\nG1 Z5 F5000 ; lift nozzle\n");
 
@@ -1758,7 +1758,7 @@ void PrintConfigDef::init_fff_params()
                    "in extruder order.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 120;
+    def->height = 12;
     def->mode = comExpert;
     def->default_value = new ConfigOptionStrings { "; Filament gcode\n" };
 
@@ -2008,7 +2008,7 @@ void PrintConfigDef::init_fff_params()
                    "as [previous_extruder] and [next_extruder].");
     def->multiline = true;
     def->full_width = true;
-    def->height = 50;
+    def->height = 5;
     def->mode = comExpert;
     def->default_value = new ConfigOptionString("");
 
@@ -2330,7 +2330,7 @@ void PrintConfigDef::init_sla_params()
     def->tooltip = L("You can put your notes regarding the SLA print material here.");
     def->multiline = true;
     def->full_width = true;
-    def->height = 130;
+    def->height = 13;
     def->mode = comAdvanced;
     def->default_value = new ConfigOptionString("");
 
diff --git a/src/slic3r/GUI/AboutDialog.cpp b/src/slic3r/GUI/AboutDialog.cpp
index 86b12a95f..fb1450ba1 100644
--- a/src/slic3r/GUI/AboutDialog.cpp
+++ b/src/slic3r/GUI/AboutDialog.cpp
@@ -32,8 +32,11 @@ void AboutDialogLogo::onRepaint(wxEvent &event)
 }
 
 AboutDialog::AboutDialog()
-    : wxDialog(NULL, wxID_ANY, wxString::Format(_(L("About %s")), SLIC3R_APP_NAME), wxDefaultPosition, wxDefaultSize, wxCAPTION)
+    : DPIDialog(NULL, wxID_ANY, wxString::Format(_(L("About %s")), SLIC3R_APP_NAME), wxDefaultPosition, 
+                wxDefaultSize, /*wxCAPTION*/wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
+    SetFont(wxGetApp().normal_font());
+
 	wxColour bgr_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 	SetBackgroundColour(bgr_clr);
     wxBoxSizer* hsizer = new wxBoxSizer(wxHORIZONTAL);
@@ -42,8 +45,9 @@ AboutDialog::AboutDialog()
 	main_sizer->Add(hsizer, 0, wxEXPAND | wxALL, 20);
 
     // logo
-    auto *logo = new wxStaticBitmap(this, wxID_ANY, create_scaled_bitmap(this, "Slic3r_192px.png", 192));
-	hsizer->Add(logo, 1, wxALIGN_CENTER_VERTICAL);
+    m_logo_bitmap = ScalableBitmap(this, "Slic3r_192px.png", 192);
+    m_logo = new wxStaticBitmap(this, wxID_ANY, m_logo_bitmap.bmp());
+	hsizer->Add(m_logo, 1, wxALIGN_CENTER_VERTICAL);
     
     wxBoxSizer* vsizer = new wxBoxSizer(wxVERTICAL); 	
     hsizer->Add(vsizer, 2, wxEXPAND|wxLEFT, 20);
@@ -51,8 +55,7 @@ AboutDialog::AboutDialog()
     // title
     {
         wxStaticText* title = new wxStaticText(this, wxID_ANY, SLIC3R_APP_NAME, wxDefaultPosition, wxDefaultSize);
-        wxFont title_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
-        title_font.SetWeight(wxFONTWEIGHT_BOLD);
+        wxFont title_font = GUI::wxGetApp().bold_font();
         title_font.SetFamily(wxFONTFAMILY_ROMAN);
         title_font.SetPointSize(24);
         title->SetFont(title_font);
@@ -63,9 +66,9 @@ AboutDialog::AboutDialog()
     {
         auto version_string = _(L("Version"))+ " " + std::string(SLIC3R_VERSION);
         wxStaticText* version = new wxStaticText(this, wxID_ANY, version_string.c_str(), wxDefaultPosition, wxDefaultSize);
-        wxFont version_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        wxFont version_font = GetFont();
         #ifdef __WXMSW__
-            version_font.SetPointSize(9);
+        version_font.SetPointSize(version_font.GetPointSize()-1);
         #else
             version_font.SetPointSize(11);
         #endif
@@ -74,18 +77,18 @@ AboutDialog::AboutDialog()
     }
     
     // text
-    wxHtmlWindow* html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO/*NEVER*/);
+    m_html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO/*NEVER*/);
     {
-        html->SetMinSize(wxSize(-1, 16 * wxGetApp().em_unit()));
-        wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        m_html->SetMinSize(wxSize(-1, 16 * wxGetApp().em_unit()));
+        wxFont font = GetFont();
         const auto text_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
 		auto text_clr_str = wxString::Format(wxT("#%02X%02X%02X"), text_clr.Red(), text_clr.Green(), text_clr.Blue());
 		auto bgr_clr_str = wxString::Format(wxT("#%02X%02X%02X"), bgr_clr.Red(), bgr_clr.Green(), bgr_clr.Blue());
 
 		const int fs = font.GetPointSize()-1;
         int size[] = {fs,fs,fs,fs,fs,fs,fs};
-        html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
-        html->SetBorders(2);
+        m_html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
+        m_html->SetBorders(2);
 		const auto text = wxString::Format(
             "<html>"
             "<body bgcolor= %s link= %s>"
@@ -101,9 +104,9 @@ AboutDialog::AboutDialog()
             "</font>"
             "</body>"
             "</html>", bgr_clr_str, text_clr_str, text_clr_str);
-        html->SetPage(text);
-        vsizer->Add(html, 1, wxEXPAND | wxBOTTOM, 10);
-        html->Bind(wxEVT_HTML_LINK_CLICKED, &AboutDialog::onLinkClicked, this);
+        m_html->SetPage(text);
+        vsizer->Add(m_html, 1, wxEXPAND | wxBOTTOM, 10);
+        m_html->Bind(wxEVT_HTML_LINK_CLICKED, &AboutDialog::onLinkClicked, this);
     }
     
     wxStdDialogButtonSizer* buttons = this->CreateStdDialogButtonSizer(wxCLOSE);
@@ -118,6 +121,29 @@ AboutDialog::AboutDialog()
 	main_sizer->SetSizeHints(this);
 }
 
+void AboutDialog::on_dpi_changed(const wxRect &suggested_rect)
+{
+    m_logo_bitmap.msw_rescale();
+    m_logo->SetBitmap(m_logo_bitmap.bmp());
+
+    const wxFont& font = GetFont();
+    const int fs = font.GetPointSize() - 1;
+    int font_size[] = { fs, fs, fs, fs, fs, fs, fs };
+    m_html->SetFonts(font.GetFaceName(), font.GetFaceName(), font_size);
+
+    const int& em = em_unit();
+
+    m_html->SetMinSize(wxSize(-1, 16 * em));
+    m_html->Refresh();
+
+    const wxSize& size = wxSize(65 * em, 30 * em);
+
+    SetMinSize(size);
+    SetSize(size);
+
+    Refresh();
+}
+
 void AboutDialog::onLinkClicked(wxHtmlLinkEvent &event)
 {
     wxLaunchDefaultBrowser(event.GetLinkInfo().GetHref());
diff --git a/src/slic3r/GUI/AboutDialog.hpp b/src/slic3r/GUI/AboutDialog.hpp
index 01f7564c5..7019b21f6 100644
--- a/src/slic3r/GUI/AboutDialog.hpp
+++ b/src/slic3r/GUI/AboutDialog.hpp
@@ -7,6 +7,9 @@
 #include <wx/intl.h>
 #include <wx/html/htmlwin.h>
 
+#include "GUI_Utils.hpp"
+#include "wxExtensions.hpp"
+
 namespace Slic3r { 
 namespace GUI {
 
@@ -20,10 +23,16 @@ private:
     void onRepaint(wxEvent &event);
 };
 
-class AboutDialog : public wxDialog
+class AboutDialog : public DPIDialog
 {
+    ScalableBitmap  m_logo_bitmap;
+    wxHtmlWindow*   m_html;
+    wxStaticBitmap* m_logo;
 public:
     AboutDialog();
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override;
     
 private:
     void onLinkClicked(wxHtmlLinkEvent &event);
diff --git a/src/slic3r/GUI/BedShapeDialog.cpp b/src/slic3r/GUI/BedShapeDialog.cpp
index 7bbf1ac7f..00ebf117c 100644
--- a/src/slic3r/GUI/BedShapeDialog.cpp
+++ b/src/slic3r/GUI/BedShapeDialog.cpp
@@ -18,6 +18,7 @@ namespace GUI {
 
 void BedShapeDialog::build_dialog(ConfigOptionPoints* default_pt)
 {
+    SetFont(wxGetApp().normal_font());
 	m_panel = new BedShapePanel(this);
 	m_panel->build_panel(default_pt);
 
@@ -36,6 +37,22 @@ void BedShapeDialog::build_dialog(ConfigOptionPoints* default_pt)
 	}));
 }
 
+void BedShapeDialog::on_dpi_changed(const wxRect &suggested_rect)
+{
+    const int& em = em_unit();
+    m_panel->m_shape_options_book->SetMinSize(wxSize(25 * em, -1));
+
+    for (auto og : m_panel->m_optgroups)
+        og->msw_rescale();
+
+    const wxSize& size = wxSize(50 * em, -1);
+
+    SetMinSize(size);
+    SetSize(size);
+
+    Refresh();
+}
+
 void BedShapePanel::build_panel(ConfigOptionPoints* default_pt)
 {
 //  on_change(nullptr);
@@ -125,7 +142,7 @@ ConfigOptionsGroupShp BedShapePanel::init_shape_options_page(wxString title)
 	ConfigOptionsGroupShp optgroup;
 	optgroup = std::make_shared<ConfigOptionsGroup>(panel, _(L("Settings")));
 
-    optgroup->label_width = 10*wxGetApp().em_unit();//100;
+    optgroup->label_width = 10;
 	optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value) {
 		update_shape();
 	};
diff --git a/src/slic3r/GUI/BedShapeDialog.hpp b/src/slic3r/GUI/BedShapeDialog.hpp
index 538fccc34..72e50a05d 100644
--- a/src/slic3r/GUI/BedShapeDialog.hpp
+++ b/src/slic3r/GUI/BedShapeDialog.hpp
@@ -16,11 +16,8 @@ namespace GUI {
 using ConfigOptionsGroupShp = std::shared_ptr<ConfigOptionsGroup>;
 class BedShapePanel : public wxPanel
 {
-	wxChoicebook*	m_shape_options_book;
 	Bed_2D*			m_canvas;
 
-	std::vector <ConfigOptionsGroupShp>	m_optgroups;
-
 public:
 	BedShapePanel(wxWindow* parent) : wxPanel(parent, wxID_ANY) {}
 	~BedShapePanel() {}
@@ -35,18 +32,25 @@ public:
 	
 	// Returns the resulting bed shape polygon. This value will be stored to the ini file.
 	std::vector<Vec2d>	GetValue() { return m_canvas->m_bed_shape; }
+
+	wxChoicebook*	m_shape_options_book;
+	std::vector <ConfigOptionsGroupShp>	m_optgroups;
+
 };
 
-class BedShapeDialog : public wxDialog
+class BedShapeDialog : public DPIDialog
 {
 	BedShapePanel*	m_panel;
 public:
-	BedShapeDialog(wxWindow* parent) : wxDialog(parent, wxID_ANY, _(L("Bed Shape")),
+	BedShapeDialog(wxWindow* parent) : DPIDialog(parent, wxID_ANY, _(L("Bed Shape")),
         wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER) {}
 	~BedShapeDialog() {}
 
 	void		build_dialog(ConfigOptionPoints* default_pt);
 	std::vector<Vec2d>	GetValue() { return m_panel->GetValue(); }
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override;
 };
 
 } // GUI
diff --git a/src/slic3r/GUI/BitmapCache.cpp b/src/slic3r/GUI/BitmapCache.cpp
index bb4145107..db116a5dd 100644
--- a/src/slic3r/GUI/BitmapCache.cpp
+++ b/src/slic3r/GUI/BitmapCache.cpp
@@ -23,6 +23,8 @@ void BitmapCache::clear()
 {
     for (std::pair<const std::string, wxBitmap*> &bitmap : m_map)
         delete bitmap.second;
+
+    m_map.clear();
 }
 
 static wxBitmap wxImage_to_wxBitmap_with_alpha(wxImage &&image, float scale = 1.0f)
@@ -259,9 +261,6 @@ wxBitmap* BitmapCache::load_svg(const std::string &bitmap_name, unsigned target_
 
 wxBitmap BitmapCache::mksolid(size_t width, size_t height, unsigned char r, unsigned char g, unsigned char b, unsigned char transparency)
 {
-    width = width * 0.1f * Slic3r::GUI::wxGetApp().em_unit() + 0.5f;
-    height = height * 0.1f * Slic3r::GUI::wxGetApp().em_unit() + 0.5f;
-
     wxImage image(width, height);
     image.InitAlpha();
     unsigned char* imgdata = image.GetData();
diff --git a/src/slic3r/GUI/ButtonsDescription.cpp b/src/slic3r/GUI/ButtonsDescription.cpp
index fb4c24286..9def34749 100644
--- a/src/slic3r/GUI/ButtonsDescription.cpp
+++ b/src/slic3r/GUI/ButtonsDescription.cpp
@@ -7,6 +7,7 @@
 #include "GUI.hpp"
 #include "GUI_App.hpp"
 #include "I18N.hpp"
+#include "wxExtensions.hpp"
 
 namespace Slic3r {
 namespace GUI {
@@ -23,7 +24,7 @@ ButtonsDescription::ButtonsDescription(wxWindow* parent, t_icon_descriptions* ic
 	// Icon description
 	for (auto pair : *m_icon_descriptions)
 	{
-		auto icon = new wxStaticBitmap(this, wxID_ANY, *pair.first);
+		auto icon = new wxStaticBitmap(this, wxID_ANY, /***/pair.first->bmp());
 		grid_sizer->Add(icon, -1, wxALIGN_CENTRE_VERTICAL);
 
 		std::istringstream f(pair.second);
diff --git a/src/slic3r/GUI/ButtonsDescription.hpp b/src/slic3r/GUI/ButtonsDescription.hpp
index 81baaf191..69005d2a5 100644
--- a/src/slic3r/GUI/ButtonsDescription.hpp
+++ b/src/slic3r/GUI/ButtonsDescription.hpp
@@ -4,10 +4,12 @@
 #include <wx/dialog.h>
 #include <vector>
 
+class ScalableBitmap;
+
 namespace Slic3r {
 namespace GUI {
 
-using t_icon_descriptions = std::vector<std::pair<wxBitmap*, std::string>>;
+using t_icon_descriptions = std::vector<std::pair<ScalableBitmap*, std::string>>;
 
 class ButtonsDescription : public wxDialog
 {
@@ -15,8 +17,6 @@ class ButtonsDescription : public wxDialog
 public:
 	ButtonsDescription(wxWindow* parent, t_icon_descriptions* icon_descriptions);
 	~ButtonsDescription() {}
-
-
 };
 
 } // GUI
diff --git a/src/slic3r/GUI/ConfigSnapshotDialog.cpp b/src/slic3r/GUI/ConfigSnapshotDialog.cpp
index 205e84f57..dd3e46229 100644
--- a/src/slic3r/GUI/ConfigSnapshotDialog.cpp
+++ b/src/slic3r/GUI/ConfigSnapshotDialog.cpp
@@ -95,21 +95,26 @@ static wxString generate_html_page(const Config::SnapshotDB &snapshot_db, const
 }
 
 ConfigSnapshotDialog::ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db, const wxString &on_snapshot)
-    : wxDialog(NULL, wxID_ANY, _(L("Configuration Snapshots")), wxDefaultPosition, 
+    : DPIDialog(NULL, wxID_ANY, _(L("Configuration Snapshots")), wxDefaultPosition, 
                wxSize(45 * wxGetApp().em_unit(), 40 * wxGetApp().em_unit()), 
                wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER | wxMAXIMIZE_BOX)
 {
+    this->SetFont(wxGetApp().normal_font());
     this->SetBackgroundColour(*wxWHITE);
     
     wxBoxSizer* vsizer = new wxBoxSizer(wxVERTICAL);
     this->SetSizer(vsizer);
 
     // text
-    wxHtmlWindow* html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO);
+    html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO);
     {
-        wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        wxFont font = wxGetApp().normal_font();//wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
         #ifdef __WXMSW__
-            int size[] = {8,8,8,8,11,11,11};
+            const int fs = font.GetPointSize();
+            const int fs1 = static_cast<int>(0.8f*fs);
+            const int fs2 = static_cast<int>(1.1f*fs);
+            int size[] = {fs1, fs1, fs1, fs1, fs2, fs2, fs2};
+//             int size[] = {8,8,8,8,11,11,11};
         #else
             int size[] = {11,11,11,11,14,14,14};
         #endif
@@ -127,6 +132,26 @@ ConfigSnapshotDialog::ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db
     vsizer->Add(buttons, 0, wxEXPAND | wxRIGHT | wxBOTTOM, 3);
 }
 
+void ConfigSnapshotDialog::on_dpi_changed(const wxRect &suggested_rect)
+{
+    wxFont font = GetFont();
+    const int fs = font.GetPointSize();
+    const int fs1 = static_cast<int>(0.8f*fs);
+    const int fs2 = static_cast<int>(1.1f*fs);
+    int font_size[] = { fs1, fs1, fs1, fs1, fs2, fs2, fs2 };
+
+    html->SetFonts(font.GetFaceName(), font.GetFaceName(), font_size);
+    html->Refresh();
+
+    const int& em = em_unit();
+    const wxSize& size = wxSize(45 * em, 40 * em);
+
+    SetMinSize(size);
+    SetSize(size);
+
+    Refresh();
+}
+
 void ConfigSnapshotDialog::onLinkClicked(wxHtmlLinkEvent &event)
 {
     m_snapshot_to_activate = event.GetLinkInfo().GetHref();
diff --git a/src/slic3r/GUI/ConfigSnapshotDialog.hpp b/src/slic3r/GUI/ConfigSnapshotDialog.hpp
index f43fb8ed1..9b8b69ecf 100644
--- a/src/slic3r/GUI/ConfigSnapshotDialog.hpp
+++ b/src/slic3r/GUI/ConfigSnapshotDialog.hpp
@@ -2,6 +2,7 @@
 #define slic3r_GUI_ConfigSnapshotDialog_hpp_
 
 #include "GUI.hpp"
+#include "GUI_Utils.hpp"
 
 #include <wx/wx.h>
 #include <wx/intl.h>
@@ -14,18 +15,23 @@ namespace Config {
 	class SnapshotDB;
 }
 
-class ConfigSnapshotDialog : public wxDialog
+class ConfigSnapshotDialog : public DPIDialog
 {
 public:
     ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db, const wxString &id);
     const std::string& snapshot_to_activate() const { return m_snapshot_to_activate; }
 
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override;
+
 private:
     void onLinkClicked(wxHtmlLinkEvent &event);
     void onCloseDialog(wxEvent &);
 
     // If set, it contains a snapshot ID to be restored after the dialog closes.
     std::string m_snapshot_to_activate;
+
+    wxHtmlWindow* html;
 };
 
 } // namespace GUI
diff --git a/src/slic3r/GUI/ConfigWizard.cpp b/src/slic3r/GUI/ConfigWizard.cpp
index e0bfccf30..5e9327ffb 100644
--- a/src/slic3r/GUI/ConfigWizard.cpp
+++ b/src/slic3r/GUI/ConfigWizard.cpp
@@ -642,16 +642,21 @@ void PageTemperatures::apply_custom_config(DynamicPrintConfig &config)
 
 ConfigWizardIndex::ConfigWizardIndex(wxWindow *parent)
     : wxPanel(parent)
-    // XXX: use create_scaled_bitmap:
+    /* #ys_FIXME_delete_after_testing by VK
     , bg(GUI::from_u8(Slic3r::var("Slic3r_192px_transparent.png")), wxBITMAP_TYPE_PNG)
     , bullet_black(GUI::from_u8(Slic3r::var("bullet_black.png")), wxBITMAP_TYPE_PNG)
     , bullet_blue(GUI::from_u8(Slic3r::var("bullet_blue.png")), wxBITMAP_TYPE_PNG)
     , bullet_white(GUI::from_u8(Slic3r::var("bullet_white.png")), wxBITMAP_TYPE_PNG)
+    */
+    , bg(ScalableBitmap(parent, "Slic3r_192px_transparent.png", 192))
+    , bullet_black(ScalableBitmap(parent, "bullet_black.png"))
+    , bullet_blue(ScalableBitmap(parent, "bullet_blue.png"))
+    , bullet_white(ScalableBitmap(parent, "bullet_white.png"))
     , item_active(0)
     , item_hover(-1)
     , last_page((size_t)-1)
 {
-    SetMinSize(bg.GetSize());
+    SetMinSize(bg.bmp().GetSize());
 
     const wxSize size = GetTextExtent("m");
     em_w = size.x;
@@ -663,7 +668,10 @@ ConfigWizardIndex::ConfigWizardIndex(wxWindow *parent)
     // In some cases it didn't work at all. And so wxStaticBitmap is used here instead,
     // because it has all the platform quirks figured out.
     auto *sizer = new wxBoxSizer(wxVERTICAL);
+    /* #ys_FIXME_delete_after_testing by VK
     auto *logo = new wxStaticBitmap(this, wxID_ANY, bg);
+    */
+    logo = new wxStaticBitmap(this, wxID_ANY, bg.bmp());
     sizer->AddStretchSpacer();
     sizer->Add(logo);
     SetSizer(sizer);
@@ -771,8 +779,12 @@ void ConfigWizardIndex::on_paint(wxPaintEvent & evt)
 
     wxPaintDC dc(this);
 
+    /* #ys_FIXME_delete_after_testing by VK
     const auto bullet_w = bullet_black.GetSize().GetWidth();
     const auto bullet_h = bullet_black.GetSize().GetHeight();
+    */
+    const auto bullet_w = bullet_black.bmp().GetSize().GetWidth();
+    const auto bullet_h = bullet_black.bmp().GetSize().GetHeight();
     const int yoff_icon = bullet_h < em_h ? (em_h - bullet_h) / 2 : 0;
     const int yoff_text = bullet_h > em_h ? (bullet_h - em_h) / 2 : 0;
     const int yinc = item_height();
@@ -785,10 +797,16 @@ void ConfigWizardIndex::on_paint(wxPaintEvent & evt)
         unsigned x = em_w/2 + item.indent * em_w;
 
         if (i == item_active || item_hover >= 0 && i == (size_t)item_hover) {
+            /*#ys_FIXME_delete_after_testing by VK
             dc.DrawBitmap(bullet_blue,  x, y + yoff_icon, false);
         }
         else if (i < item_active)  { dc.DrawBitmap(bullet_black, x, y + yoff_icon, false); }
         else if (i > item_active)  { dc.DrawBitmap(bullet_white, x, y + yoff_icon, false); }
+            */
+            dc.DrawBitmap(bullet_blue.bmp(), x, y + yoff_icon, false);
+        }
+        else if (i < item_active)  { dc.DrawBitmap(bullet_black.bmp(), x, y + yoff_icon, false); }
+        else if (i > item_active)  { dc.DrawBitmap(bullet_white.bmp(), x, y + yoff_icon, false); }
 
         x += + bullet_w + em_w/2;
         const auto text_size = dc.GetTextExtent(item.label);
@@ -821,6 +839,18 @@ void ConfigWizardIndex::on_mouse_move(wxMouseEvent &evt)
     evt.Skip();
 }
 
+void ConfigWizardIndex::msw_rescale()
+{
+    bg.msw_rescale();
+    SetMinSize(bg.bmp().GetSize());
+    logo->SetBitmap(bg.bmp());
+
+    bullet_black.msw_rescale();
+    bullet_blue.msw_rescale();
+    bullet_white.msw_rescale();
+    Refresh();
+}
+
 
 // priv
 
@@ -995,9 +1025,10 @@ void ConfigWizard::priv::apply_config(AppConfig *app_config, PresetBundle *prese
 // Public
 
 ConfigWizard::ConfigWizard(wxWindow *parent, RunReason reason)
-    : wxDialog(parent, wxID_ANY, _(name().ToStdString()), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
+    : DPIDialog(parent, wxID_ANY, _(name().ToStdString()), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
     , p(new priv(this))
 {
+    this->SetFont(wxGetApp().normal_font());
     p->run_reason = reason;
 
     p->load_vendors();
@@ -1141,5 +1172,11 @@ const wxString& ConfigWizard::name(const bool from_menu/* = false*/)
     return from_menu ? config_wizard_name_menu : config_wizard_name;
 }
 
+void ConfigWizard::on_dpi_changed(const wxRect &suggested_rect)
+{
+    p->index->msw_rescale();
+    Refresh();
+}
+
 }
 }
diff --git a/src/slic3r/GUI/ConfigWizard.hpp b/src/slic3r/GUI/ConfigWizard.hpp
index c9ee05529..b707e525b 100644
--- a/src/slic3r/GUI/ConfigWizard.hpp
+++ b/src/slic3r/GUI/ConfigWizard.hpp
@@ -5,6 +5,8 @@
 
 #include <wx/dialog.h>
 
+#include "GUI_Utils.hpp"
+
 namespace Slic3r {
 
 class PresetBundle;
@@ -13,7 +15,7 @@ class PresetUpdater;
 namespace GUI {
 
 
-class ConfigWizard: public wxDialog
+class ConfigWizard: public DPIDialog
 {
 public:
     // Why is the Wizard run
@@ -35,6 +37,10 @@ public:
     bool run(PresetBundle *preset_bundle, const PresetUpdater *updater);
 
     static const wxString& name(const bool from_menu = false);
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override ;
+
 private:
     struct priv;
     std::unique_ptr<priv> p;
diff --git a/src/slic3r/GUI/ConfigWizard_private.hpp b/src/slic3r/GUI/ConfigWizard_private.hpp
index 792b92015..31a990b60 100644
--- a/src/slic3r/GUI/ConfigWizard_private.hpp
+++ b/src/slic3r/GUI/ConfigWizard_private.hpp
@@ -210,6 +210,7 @@ public:
     void go_to(ConfigWizardPage *page);
 
     void clear();
+    void msw_rescale();
 
     int em() const { return em_w; }
 private:
@@ -224,18 +225,27 @@ private:
 
     int em_w;
     int em_h;
-
+    /* #ys_FIXME_delete_after_testing by VK 
     const wxBitmap bg;
     const wxBitmap bullet_black;
     const wxBitmap bullet_blue;
     const wxBitmap bullet_white;
+    */
+    ScalableBitmap bg;
+    ScalableBitmap bullet_black;
+    ScalableBitmap bullet_blue;
+    ScalableBitmap bullet_white;
+    wxStaticBitmap* logo;
 
     std::vector<Item> items;
     size_t item_active;
     ssize_t item_hover;
     size_t last_page;
 
+    /* #ys_FIXME_delete_after_testing by VK 
     int item_height() const { return std::max(bullet_black.GetSize().GetHeight(), em_w) + em_w; }
+    */
+    int item_height() const { return std::max(bullet_black.bmp().GetSize().GetHeight(), em_w) + em_w; }
 
     void on_paint(wxPaintEvent &evt);
     void on_mouse_move(wxMouseEvent &evt);
diff --git a/src/slic3r/GUI/Field.cpp b/src/slic3r/GUI/Field.cpp
index 6da0800d9..822361c5d 100644
--- a/src/slic3r/GUI/Field.cpp
+++ b/src/slic3r/GUI/Field.cpp
@@ -33,21 +33,11 @@ wxString double_to_string(double const value, const int max_precision /*= 4*/)
 void Field::PostInitialize()
 {
 	auto color = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
-	m_Undo_btn			= new MyButton(m_parent, wxID_ANY, "", wxDefaultPosition,wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-	m_Undo_to_sys_btn	= new MyButton(m_parent, wxID_ANY, "", wxDefaultPosition,wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-	if (wxMSW) {
-		m_Undo_btn->SetBackgroundColour(color);
-		m_Undo_btn->SetBackgroundStyle(wxBG_STYLE_PAINT);
-		m_Undo_to_sys_btn->SetBackgroundColour(color);
-		m_Undo_to_sys_btn->SetBackgroundStyle(wxBG_STYLE_PAINT);
-	}
-	m_Undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent) { on_back_to_initial_value(); }));
-	m_Undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent) { on_back_to_sys_value(); }));
+	m_Undo_btn			= new RevertButton(m_parent, "bullet_white.png");
+	m_Undo_to_sys_btn	= new RevertButton(m_parent, "bullet_white.png");
 
-	//set default bitmap
-	wxBitmap bmp = create_scaled_bitmap(m_parent, "bullet_white.png");
-	set_undo_bitmap(&bmp);
-	set_undo_to_sys_bitmap(&bmp);
+    m_Undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent) { on_back_to_initial_value(); }));
+	m_Undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent) { on_back_to_sys_value(); }));
 
 	switch (m_opt.type)
 	{
@@ -65,6 +55,9 @@ void Field::PostInitialize()
 		break;
 	}
 
+    // initialize m_unit_value
+    m_em_unit = em_unit(m_parent);
+
 	BUILD();
 }
 
@@ -212,8 +205,8 @@ bool is_defined_input_value(wxWindow* win, const ConfigOptionType& type)
 
 void TextCtrl::BUILD() {
     auto size = wxSize(wxDefaultSize);
-    if (m_opt.height >= 0) size.SetHeight(m_opt.height);
-    if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
 
 	wxString text_value = wxString(""); 
 
@@ -357,6 +350,21 @@ boost::any& TextCtrl::get_value()
 	return m_value;
 }
 
+void TextCtrl::msw_rescale()
+{
+    Field::msw_rescale();
+    auto size = wxSize(wxDefaultSize);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
+
+    if (size != wxDefaultSize)
+    {
+        wxTextCtrl* field = dynamic_cast<wxTextCtrl*>(window);
+        field->SetMinSize(size);
+    }
+
+}
+
 void TextCtrl::enable() { dynamic_cast<wxTextCtrl*>(window)->Enable(); dynamic_cast<wxTextCtrl*>(window)->SetEditable(true); }
 void TextCtrl::disable() { dynamic_cast<wxTextCtrl*>(window)->Disable(); dynamic_cast<wxTextCtrl*>(window)->SetEditable(false); }
 
@@ -379,7 +387,8 @@ void CheckBox::BUILD() {
 						static_cast<const ConfigOptionBools*>(m_opt.default_value)->get_at(m_opt_idx) : 
     					false;
 
-	auto temp = new wxCheckBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size); 
+	// Set Label as a string of at least one space simbol to correct system scaling of a CheckBox 
+	auto temp = new wxCheckBox(m_parent, wxID_ANY, wxString(" "), wxDefaultPosition, size); 
 	temp->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 	temp->SetBackgroundStyle(wxBG_STYLE_PAINT);
 	temp->SetValue(check_value);
@@ -408,8 +417,8 @@ int undef_spin_val = -9999;		//! Probably, It's not necessary
 
 void SpinCtrl::BUILD() {
 	auto size = wxSize(wxDefaultSize);
-	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
-	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
 
 	wxString	text_value = wxString("");
 	int			default_value = 0;
@@ -504,10 +513,18 @@ void SpinCtrl::propagate_value()
         on_change_field();
 }
 
+void SpinCtrl::msw_rescale()
+{
+    Field::msw_rescale();
+
+    wxSpinCtrl* field = dynamic_cast<wxSpinCtrl*>(window);
+    field->SetMinSize(wxSize(-1, int(1.9f*field->GetFont().GetPixelSize().y)));
+}
+
 void Choice::BUILD() {
-    wxSize size(15 * wxGetApp().em_unit(), -1);
-	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
-	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+    wxSize size(m_width * m_em_unit, -1);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
 
 	wxBitmapComboBox* temp;	
     if (!m_opt.gui_type.empty() && m_opt.gui_type.compare("select_open") != 0) {
@@ -816,11 +833,53 @@ boost::any& Choice::get_value()
 	return m_value;
 }
 
+void Choice::msw_rescale()
+{
+    Field::msw_rescale();
+
+    wxBitmapComboBox* field = dynamic_cast<wxBitmapComboBox*>(window);
+
+    const wxString selection = field->GetString(field->GetSelection());
+
+	/* To correct scaling (set new controll size) of a wxBitmapCombobox 
+	 * we need to refill control with new bitmaps. So, in our case : 
+	 * 1. clear conrol
+	 * 2. add content
+	 * 3. add scaled "empty" bitmap to the at least one item
+	 */
+    field->Clear();
+    wxSize size(wxDefaultSize);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height * m_em_unit);
+    size.SetWidth((m_opt.width > 0 ? m_opt.width : m_width) * m_em_unit);
+    
+    field->SetSize(size);
+
+    size_t idx, counter = idx = 0;
+    if (m_opt.enum_labels.empty() && m_opt.enum_values.empty()) {}
+    else{
+        for (auto el : m_opt.enum_labels.empty() ? m_opt.enum_values : m_opt.enum_labels) {
+            const wxString& str = _(el);
+            field->Append(str);
+            if (el.compare(selection) == 0)
+                idx = counter;
+            ++counter;
+        }
+    }
+
+    wxBitmap empty_bmp(1, field->GetFont().GetPixelSize().y + 2);
+    empty_bmp.SetWidth(0);
+    field->SetItemBitmap(0, empty_bmp);
+
+    idx == m_opt.enum_values.size() ?
+        field->SetValue(selection) :
+        field->SetSelection(idx);
+}
+
 void ColourPicker::BUILD()
 {
 	auto size = wxSize(wxDefaultSize);
-	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
-	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
 
 	// Validate the color
 	wxString clr_str(static_cast<const ConfigOptionStrings*>(m_opt.default_value)->get_at(m_opt_idx));
@@ -855,7 +914,7 @@ void PointCtrl::BUILD()
 {
 	auto temp = new wxBoxSizer(wxHORIZONTAL);
 
-    const wxSize field_size(4 * wxGetApp().em_unit(), -1);
+    const wxSize field_size(4 * m_em_unit, -1);
 
 	auto default_pt = static_cast<const ConfigOptionPoints*>(m_opt.default_value)->values.at(0);
 	double val = default_pt(0);
@@ -898,6 +957,16 @@ void PointCtrl::BUILD()
 	y_textctrl->SetToolTip(get_tooltip_text(X+", "+Y));
 }
 
+void PointCtrl::msw_rescale()
+{
+    Field::msw_rescale();
+
+    const wxSize field_size(4 * m_em_unit, -1);
+
+    x_textctrl->SetMinSize(field_size);
+    y_textctrl->SetMinSize(field_size);
+}
+
 void PointCtrl::propagate_value(wxTextCtrl* win)
 {
     if (!win->GetValue().empty()) 
@@ -943,8 +1012,8 @@ boost::any& PointCtrl::get_value()
 void StaticText::BUILD()
 {
 	auto size = wxSize(wxDefaultSize);
-	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
-	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
 
     const wxString legend(static_cast<const ConfigOptionString*>(m_opt.default_value)->value);
     auto temp = new wxStaticText(m_parent, wxID_ANY, legend, wxDefaultPosition, size, wxST_ELLIPSIZE_MIDDLE);
@@ -958,6 +1027,21 @@ void StaticText::BUILD()
 	temp->SetToolTip(get_tooltip_text(legend));
 }
 
+void StaticText::msw_rescale()
+{
+    Field::msw_rescale();
+
+    auto size = wxSize(wxDefaultSize);
+    if (m_opt.height >= 0) size.SetHeight(m_opt.height*m_em_unit);
+    if (m_opt.width >= 0) size.SetWidth(m_opt.width*m_em_unit);
+
+    if (size != wxDefaultSize)
+    {
+        wxStaticText* field = dynamic_cast<wxStaticText*>(window);
+        field->SetSize(size);
+    }
+}
+
 void SliderCtrl::BUILD()
 {
 	auto size = wxSize(wxDefaultSize);
diff --git a/src/slic3r/GUI/Field.hpp b/src/slic3r/GUI/Field.hpp
index 128d60d47..516570ea8 100644
--- a/src/slic3r/GUI/Field.hpp
+++ b/src/slic3r/GUI/Field.hpp
@@ -19,6 +19,7 @@
 #include "libslic3r/Utils.hpp"
 
 #include "GUI.hpp"
+#include "wxExtensions.hpp"
 
 #ifdef __WXMSW__
 #define wxMSW true
@@ -36,19 +37,24 @@ using t_back_to_init = std::function<void(const std::string&)>;
 
 wxString double_to_string(double const value, const int max_precision = 4);
 
-class MyButton : public wxButton
+class RevertButton : public ScalableButton
 {
     bool hidden = false; // never show button if it's hidden ones
 public:
-	MyButton() {}
-	MyButton(wxWindow* parent, wxWindowID id, const wxString& label = wxEmptyString,
-		const wxPoint& pos = wxDefaultPosition,
-		const wxSize& size = wxDefaultSize, long style = 0,
-		const wxValidator& validator = wxDefaultValidator,
-		const wxString& name = wxTextCtrlNameStr)
-	{
-		this->Create(parent, id, label, pos, size, style, validator, name);
-	}
+// 	RevertButton() {} 
+// 	RevertButton(wxWindow* parent, wxWindowID id, const wxString& label = wxEmptyString,
+// 		const wxPoint& pos = wxDefaultPosition,
+// 		const wxSize& size = wxDefaultSize, long style = 0,
+// 		const wxValidator& validator = wxDefaultValidator,
+// 		const wxString& name = wxTextCtrlNameStr)
+// 	{
+// 		this->Create(parent, id, label, pos, size, style, validator, name);
+// 	}
+    RevertButton(
+        wxWindow *parent,
+        const std::string& icon_name = ""
+        ) :
+        ScalableButton(parent, wxID_ANY, icon_name) {}
 
 	// overridden from wxWindow base class
 	virtual bool
@@ -154,19 +160,19 @@ public:
 		return std::move(p); //!p;
     }
 
-    bool 	set_undo_bitmap(const wxBitmap *bmp) {
+    bool 	set_undo_bitmap(const ScalableBitmap *bmp) {
     	if (m_undo_bitmap != bmp) {
     		m_undo_bitmap = bmp;
-    		m_Undo_btn->SetBitmap(*bmp);
+    		m_Undo_btn->SetBitmap_(*bmp);
     		return true;
     	}
     	return false;
     }
 
-    bool 	set_undo_to_sys_bitmap(const wxBitmap *bmp) {
+    bool 	set_undo_to_sys_bitmap(const ScalableBitmap *bmp) {
     	if (m_undo_to_sys_bitmap != bmp) {
     		m_undo_to_sys_bitmap = bmp;
-    		m_Undo_to_sys_btn->SetBitmap(*bmp);
+    		m_Undo_to_sys_btn->SetBitmap_(*bmp);
     		return true;
     	}
     	return false;
@@ -211,15 +217,23 @@ public:
 		m_side_text = side_text;
     }
 
+    virtual void msw_rescale() {
+        m_Undo_to_sys_btn->msw_rescale();
+        m_Undo_btn->msw_rescale();
+
+        // update em_unit value
+        m_em_unit = em_unit(m_parent);
+    }
+
 protected:
-	MyButton*			m_Undo_btn = nullptr;
+	RevertButton*			m_Undo_btn = nullptr;
 	// Bitmap and Tooltip text for m_Undo_btn. The wxButton will be updated only if the new wxBitmap pointer differs from the currently rendered one.
-	const wxBitmap*		m_undo_bitmap = nullptr;
-	const wxString*		m_undo_tooltip = nullptr;
-	MyButton*			m_Undo_to_sys_btn = nullptr;
+	const ScalableBitmap*   m_undo_bitmap = nullptr;
+	const wxString*         m_undo_tooltip = nullptr;
+	RevertButton*			m_Undo_to_sys_btn = nullptr;
 	// Bitmap and Tooltip text for m_Undo_to_sys_btn. The wxButton will be updated only if the new wxBitmap pointer differs from the currently rendered one.
-	const wxBitmap*		m_undo_to_sys_bitmap = nullptr;
-	const wxString*		m_undo_to_sys_tooltip = nullptr;
+    const ScalableBitmap*   m_undo_to_sys_bitmap = nullptr;
+	const wxString*		    m_undo_to_sys_tooltip = nullptr;
 
 	wxStaticText*		m_Label = nullptr;
 	// Color for Label. The wxColour will be updated only if the new wxColour pointer differs from the currently rendered one.
@@ -230,6 +244,8 @@ protected:
 	// current value
 	boost::any			m_value;
 
+    int                 m_em_unit;
+
     bool    bEnterPressed = false;
     
 	friend class OptionsGroup;
@@ -273,6 +289,8 @@ public:
     }
 
 	boost::any&		get_value() override;
+
+    void            msw_rescale() override;
     
     virtual void	enable();
     virtual void	disable();
@@ -337,6 +355,8 @@ public:
 		return m_value = tmp_value;
 	}
 
+    void            msw_rescale() override;
+
 	void			enable() override { dynamic_cast<wxSpinCtrl*>(window)->Enable(); }
 	void			disable() override { dynamic_cast<wxSpinCtrl*>(window)->Disable(); }
 	wxWindow*		getWindow() override { return window; }
@@ -344,6 +364,7 @@ public:
 
 class Choice : public Field {
 	using Field::Field;
+    int             m_width{ 15 };
 public:
 	Choice(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
 	Choice(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
@@ -363,6 +384,8 @@ public:
 	void			set_values(const std::vector<std::string> &values);
 	boost::any&		get_value() override;
 
+    void            msw_rescale() override;
+
 	void			enable() override { dynamic_cast<wxBitmapComboBox*>(window)->Enable(); };
 	void			disable() override{ dynamic_cast<wxBitmapComboBox*>(window)->Disable(); };
 	wxWindow*		getWindow() override { return window; }
@@ -414,6 +437,8 @@ public:
 	void			set_value(const boost::any& value, bool change_event = false);
 	boost::any&		get_value() override;
 
+    void            msw_rescale() override;
+
 	void			enable() override {
 		x_textctrl->Enable();
 		y_textctrl->Enable(); }
@@ -446,6 +471,8 @@ public:
 
 	boost::any&		get_value()override { return m_value; }
 
+    void            msw_rescale() override;
+
 	void			enable() override { dynamic_cast<wxStaticText*>(window)->Enable(); };
 	void			disable() override{ dynamic_cast<wxStaticText*>(window)->Disable(); };
 	wxWindow*		getWindow() override { return window; }
diff --git a/src/slic3r/GUI/FirmwareDialog.cpp b/src/slic3r/GUI/FirmwareDialog.cpp
index 8095a3237..4fdc57679 100644
--- a/src/slic3r/GUI/FirmwareDialog.cpp
+++ b/src/slic3r/GUI/FirmwareDialog.cpp
@@ -732,7 +732,7 @@ const char* FirmwareDialog::priv::avr109_dev_name(Avr109Pid usb_pid) {
 // Public
 
 FirmwareDialog::FirmwareDialog(wxWindow *parent) :
-	wxDialog(parent, wxID_ANY, _(L("Firmware flasher")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER),
+	GUI::DPIDialog(parent, wxID_ANY, _(L("Firmware flasher")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER),
 	p(new priv(this))
 {
 	enum {
@@ -748,7 +748,13 @@ FirmwareDialog::FirmwareDialog(wxWindow *parent) :
 	int min_height = MIN_HEIGHT * em;
 	int min_height_expanded = MIN_HEIGHT_EXPANDED * em;
 
-	wxFont status_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+    /* get current font from application, 
+     * because of wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT) function
+     * returns font for primary Display
+     */
+    const wxFont& font = GUI::wxGetApp().normal_font();
+    SetFont(font);
+    wxFont status_font = font;//wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 	status_font.MakeBold();
 	wxFont mono_font(wxFontInfo().Family(wxFONTFAMILY_TELETYPE));
 	mono_font.MakeSmaller();
diff --git a/src/slic3r/GUI/FirmwareDialog.hpp b/src/slic3r/GUI/FirmwareDialog.hpp
index ad048bf5d..a1eac00de 100644
--- a/src/slic3r/GUI/FirmwareDialog.hpp
+++ b/src/slic3r/GUI/FirmwareDialog.hpp
@@ -4,12 +4,13 @@
 #include <memory>
 
 #include <wx/dialog.h>
+#include "GUI_Utils.hpp"
 
 
 namespace Slic3r {
 
 
-class FirmwareDialog: public wxDialog
+class FirmwareDialog: public GUI::DPIDialog
 {
 public:
 	FirmwareDialog(wxWindow *parent);
@@ -20,6 +21,9 @@ public:
 	~FirmwareDialog();
 
 	static void run(wxWindow *parent);
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override{;}
 private:
 	struct priv;
 	std::unique_ptr<priv> p;
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index d06fe3cfd..340b0ea9a 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -706,6 +706,7 @@ void GLCanvas3D::WarningTexture::activate(WarningTexture::Warning warning, bool
         m_warnings.erase(it);
         if (m_warnings.empty()) { // nothing remains to be shown
             reset();
+            m_msg_text = "";// save information for rescaling
             return;
         }
     }
@@ -726,6 +727,10 @@ void GLCanvas3D::WarningTexture::activate(WarningTexture::Warning warning, bool
     }
 
     _generate(text, canvas, red_colored); // GUI::GLTexture::reset() is called at the beginning of generate(...)
+
+    // save information for rescaling
+    m_msg_text = text;
+    m_is_colored_red = red_colored;
 }
 
 
@@ -794,7 +799,9 @@ bool GLCanvas3D::WarningTexture::_generate(const std::string& msg_utf8, const GL
     wxMemoryDC memDC;
     // select default font
     const float scale = canvas.get_canvas_size().get_scale_factor();
-    wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Scale(scale);
+//     wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Scale(scale);
+    wxFont font = wxGetApp().normal_font();//! #ys_FIXME_experiment
+
     font.MakeLarger();
     font.MakeBold();
     memDC.SetFont(font);
@@ -895,6 +902,14 @@ void GLCanvas3D::WarningTexture::render(const GLCanvas3D& canvas) const
     }
 }
 
+void GLCanvas3D::WarningTexture::rescale(const GLCanvas3D& canvas)
+{
+    if (m_msg_text.empty())
+        return;
+
+    _generate(m_msg_text, canvas, m_is_colored_red);
+}
+
 const unsigned char GLCanvas3D::LegendTexture::Squares_Border_Color[3] = { 64, 64, 64 };
 const unsigned char GLCanvas3D::LegendTexture::Default_Background_Color[3] = { (unsigned char)(DEFAULT_BG_LIGHT_COLOR[0] * 255.0f), (unsigned char)(DEFAULT_BG_LIGHT_COLOR[1] * 255.0f), (unsigned char)(DEFAULT_BG_LIGHT_COLOR[2] * 255.0f) };
 const unsigned char GLCanvas3D::LegendTexture::Error_Background_Color[3] = { (unsigned char)(ERROR_BG_LIGHT_COLOR[0] * 255.0f), (unsigned char)(ERROR_BG_LIGHT_COLOR[1] * 255.0f), (unsigned char)(ERROR_BG_LIGHT_COLOR[2] * 255.0f) };
@@ -965,7 +980,8 @@ bool GLCanvas3D::LegendTexture::generate(const GCodePreviewData& preview_data, c
     const int scaled_border = Px_Border * scale;
 
     // select default font
-    wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Scale(scale_gl);
+//     wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Scale(scale_gl);
+    wxFont font = wxGetApp().normal_font();//! #ys_FIXME_experiment
 #ifdef __WXMSW__
     // Disabling ClearType works, but the font returned is very different (much thicker) from the default.
 //    msw_disable_cleartype(font);
@@ -3285,6 +3301,11 @@ void GLCanvas3D::set_cursor(ECursorType type)
     }
 }
 
+void GLCanvas3D::msw_rescale()
+{
+    m_warning_texture.rescale(*this);
+}
+
 bool GLCanvas3D::_is_shown_on_screen() const
 {
     return (m_canvas != nullptr) ? m_canvas->IsShownOnScreen() : false;
@@ -4009,7 +4030,8 @@ void GLCanvas3D::_render_gizmos_overlay() const
 #if ENABLE_RETINA_GL
     m_gizmos.set_overlay_scale(m_retina_helper->get_scale_factor());
 #else
-    m_gizmos.set_overlay_scale(m_canvas->GetContentScaleFactor());
+//     m_gizmos.set_overlay_scale(m_canvas->GetContentScaleFactor());
+    m_gizmos.set_overlay_scale(wxGetApp().em_unit()*0.1f);//! #ys_FIXME_experiment
 #endif /* __WXMSW__ */
 
     m_gizmos.render_overlay(*this, m_selection);
@@ -4021,7 +4043,8 @@ void GLCanvas3D::_render_toolbar() const
 #if ENABLE_RETINA_GL
     m_toolbar.set_scale(m_retina_helper->get_scale_factor());
 #else
-    m_toolbar.set_scale(m_canvas->GetContentScaleFactor());
+//     m_toolbar.set_scale(m_canvas->GetContentScaleFactor());
+    m_toolbar.set_scale(wxGetApp().em_unit()*0.1f);//! #ys_FIXME_experiment
 #endif // ENABLE_RETINA_GL
 
     Size cnv_size = get_canvas_size();
@@ -4084,7 +4107,8 @@ void GLCanvas3D::_render_view_toolbar() const
 #if ENABLE_RETINA_GL
     m_view_toolbar.set_scale(m_retina_helper->get_scale_factor());
 #else
-    m_view_toolbar.set_scale(m_canvas->GetContentScaleFactor());
+//     m_view_toolbar.set_scale(m_canvas->GetContentScaleFactor());
+    m_view_toolbar.set_scale(wxGetApp().em_unit()*0.1f); //! #ys_FIXME_experiment
 #endif // ENABLE_RETINA_GL
 
     Size cnv_size = get_canvas_size();
diff --git a/src/slic3r/GUI/GLCanvas3D.hpp b/src/slic3r/GUI/GLCanvas3D.hpp
index 1f139a2b1..e29b78f8d 100644
--- a/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/src/slic3r/GUI/GLCanvas3D.hpp
@@ -352,6 +352,9 @@ class GLCanvas3D
         void activate(WarningTexture::Warning warning, bool state, const GLCanvas3D& canvas);
         void render(const GLCanvas3D& canvas) const;
 
+        // function used to get an information for rescaling of the warning
+        void rescale(const GLCanvas3D& canvas);
+
     private:
         static const unsigned char Background_Color[3];
         static const unsigned char Opacity;
@@ -359,6 +362,10 @@ class GLCanvas3D
         int m_original_width;
         int m_original_height;
 
+        // information for rescaling of the warning legend
+        std::string     m_msg_text = "";
+        bool            m_is_colored_red{false};
+
         // Information about which warnings are currently active.
         std::vector<Warning> m_warnings;
 
@@ -612,6 +619,7 @@ public:
     double get_size_proportional_to_max_bed_size(double factor) const;
 
     void set_cursor(ECursorType type);
+    void msw_rescale();
 
 private:
     bool _is_shown_on_screen() const;
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 62b8581be..154b4475f 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -325,6 +325,17 @@ void GUI_App::init_fonts()
 #endif /*__WXMAC__*/
 }
 
+void GUI_App::update_fonts()
+{
+    /* Only normal and bold fonts are used for an application rescale,
+     * because of under MSW small and normal fonts are the same.
+     * To avoid same rescaling twice, just fill this values
+     * from rescaled MainFrame
+     */
+    m_normal_font   = mainframe->normal_font();
+    m_bold_font     = mainframe->normal_font().Bold();
+}
+
 void GUI_App::set_label_clr_modified(const wxColour& clr) {
     m_color_label_modified = clr;
     auto clr_str = wxString::Format(wxT("#%02X%02X%02X"), clr.Red(), clr.Green(), clr.Blue());
@@ -669,6 +680,12 @@ void GUI_App::add_config_menu(wxMenuBar *menu)
             // Take a configuration snapshot.
             if (check_unsaved_changes()) {
                 wxTextEntryDialog dlg(nullptr, _(L("Taking configuration snapshot")), _(L("Snapshot name")));
+                
+                // set current normal font for dialog children, 
+                // because of just dlg.SetFont(normal_font()) has no result;
+                for (auto child : dlg.GetChildren())
+                    child->SetFont(normal_font());
+
                 if (dlg.ShowModal() == wxID_OK)
                     app_config->set("on_snapshot",
                     Slic3r::GUI::Config::SnapshotDB::singleton().take_snapshot(
@@ -718,7 +735,6 @@ void GUI_App::add_config_menu(wxMenuBar *menu)
             get_installed_languages(names, identifiers);
             if (select_language(names, identifiers)) {
                 save_language();
-//                 show_info(mainframe->m_tabpanel, _(L("Application will be restarted")), _(L("Attention!")));
                 _3DScene::remove_all_canvases();// remove all canvas before recreate GUI
                 recreate_GUI();
             }
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index 3537f98e4..d3c9e0afa 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -98,6 +98,7 @@ public:
     void            init_label_colours();
     void            update_label_colours_from_appconfig();
     void            init_fonts();
+    void            update_fonts();
     void            set_label_clr_modified(const wxColour& clr);
     void            set_label_clr_sys(const wxColour& clr);
 
diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index f8ad8b7bb..f9df2649c 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -163,7 +163,7 @@ void ObjectList::create_objects_ctrl()
     m_sizer = new wxBoxSizer(wxVERTICAL);
     m_sizer->Add(this, 1, wxGROW);
 
-    m_objects_model = new PrusaObjectDataViewModel;
+    m_objects_model = new ObjectDataViewModel;
     AssociateModel(m_objects_model);
     m_objects_model->SetAssociatedControl(this);
 #if wxUSE_DRAG_AND_DROP && wxUSE_UNICODE
@@ -173,7 +173,7 @@ void ObjectList::create_objects_ctrl()
 
     // column 0(Icon+Text) of the view control: 
     // And Icon can be consisting of several bitmaps
-    AppendColumn(new wxDataViewColumn(_(L("Name")), new PrusaBitmapTextRenderer(),
+    AppendColumn(new wxDataViewColumn(_(L("Name")), new BitmapTextRenderer(),
         0, 20*wxGetApp().em_unit()/*200*/, wxALIGN_LEFT, wxDATAVIEW_COL_RESIZABLE));
 
     // column 1 of the view control:
@@ -203,7 +203,7 @@ void ObjectList::set_tooltip_for_item(const wxPoint& pt)
     if (col->GetTitle() == " " && GetSelectedItemsCount()<2)
         GetMainWindow()->SetToolTip(_(L("Right button click the icon to change the object settings")));
     else if (col->GetTitle() == _("Name") &&
-        m_objects_model->GetBitmap(item).GetRefData() == m_bmp_manifold_warning.GetRefData()) {
+        m_objects_model->GetBitmap(item).GetRefData() == m_bmp_manifold_warning.bmp().GetRefData()) {
         int obj_idx = m_objects_model->GetIdByItem(item);
         auto& stats = (*m_objects)[obj_idx]->volumes[0]->mesh.stl.stats;
         int errors = stats.degenerate_facets + stats.edges_fixed + stats.facets_removed +
@@ -395,27 +395,71 @@ void ObjectList::update_name_in_model(const wxDataViewItem& item) const
 
 void ObjectList::init_icons()
 {
-    m_bmp_modifiermesh     = create_scaled_bitmap(nullptr, "add_modifier");
-    m_bmp_solidmesh        = create_scaled_bitmap(nullptr, "add_part");
-    m_bmp_support_enforcer = create_scaled_bitmap(nullptr, "support_enforcer");
-    m_bmp_support_blocker  = create_scaled_bitmap(nullptr, "support_blocker");
-
+    m_bmp_modifiermesh      = ScalableBitmap(nullptr, "add_modifier");    // Add part 
+    m_bmp_solidmesh         = ScalableBitmap(nullptr, "add_part");        // Add modifier 
+    m_bmp_support_enforcer  = ScalableBitmap(nullptr, "support_enforcer");// Add support enforcer 
+    m_bmp_support_blocker   = ScalableBitmap(nullptr, "support_blocker"); // Add support blocker  
 
     m_bmp_vector.reserve(4); // bitmaps for different types of parts 
-    m_bmp_vector.push_back(&m_bmp_solidmesh);         // Add part
-    m_bmp_vector.push_back(&m_bmp_modifiermesh);      // Add modifier
-    m_bmp_vector.push_back(&m_bmp_support_enforcer);  // Add support enforcer
-    m_bmp_vector.push_back(&m_bmp_support_blocker);   // Add support blocker
+    m_bmp_vector.push_back(&m_bmp_solidmesh.bmp());         
+    m_bmp_vector.push_back(&m_bmp_modifiermesh.bmp());      
+    m_bmp_vector.push_back(&m_bmp_support_enforcer.bmp());  
+    m_bmp_vector.push_back(&m_bmp_support_blocker.bmp());   
+
+
+    // Set volumes default bitmaps for the model
     m_objects_model->SetVolumeBitmaps(m_bmp_vector);
 
     // init icon for manifold warning
-    m_bmp_manifold_warning  = create_scaled_bitmap(nullptr, "exclamation");
+    m_bmp_manifold_warning  = ScalableBitmap(nullptr, "exclamation");
 
     // init bitmap for "Split to sub-objects" context menu
-    m_bmp_split             = create_scaled_bitmap(nullptr, "split_parts_SMALL");
+    m_bmp_split             = ScalableBitmap(nullptr, "split_parts_SMALL");
 
     // init bitmap for "Add Settings" context menu
-    m_bmp_cog               = create_scaled_bitmap(nullptr, "cog");
+    m_bmp_cog               = ScalableBitmap(nullptr, "cog");
+}
+
+void ObjectList::rescale_icons()
+{
+    m_bmp_vector.clear();
+    m_bmp_vector.reserve(4); // bitmaps for different types of parts 
+    for (ScalableBitmap* bitmap : std::vector<ScalableBitmap*> {
+                                    &m_bmp_modifiermesh,         // Add part
+                                    &m_bmp_solidmesh,             // Add modifier
+                                    &m_bmp_support_enforcer,     // Add support enforcer
+                                    &m_bmp_support_blocker })    // Add support blocker                                                           
+    {
+        bitmap->msw_rescale();
+        m_bmp_vector.push_back(& bitmap->bmp());
+    }
+    // Set volumes default bitmaps for the model
+    m_objects_model->SetVolumeBitmaps(m_bmp_vector);
+
+    m_bmp_manifold_warning.msw_rescale();
+    m_bmp_split.msw_rescale();
+    m_bmp_cog.msw_rescale();
+
+
+    // Update CATEGORY_ICON according to new scale
+    {
+        // Note: `this` isn't passed to create_scaled_bitmap() here because of bugs in the widget,
+        // see note in PresetBundle::load_compatible_bitmaps()
+
+        // ptFFF
+        CATEGORY_ICON[L("Layers and Perimeters")]    = create_scaled_bitmap(nullptr, "layers");
+        CATEGORY_ICON[L("Infill")]                   = create_scaled_bitmap(nullptr, "infill");
+        CATEGORY_ICON[L("Support material")]         = create_scaled_bitmap(nullptr, "support");
+        CATEGORY_ICON[L("Speed")]                    = create_scaled_bitmap(nullptr, "time");
+        CATEGORY_ICON[L("Extruders")]                = create_scaled_bitmap(nullptr, "funnel");
+        CATEGORY_ICON[L("Extrusion Width")]          = create_scaled_bitmap(nullptr, "funnel");
+//         CATEGORY_ICON[L("Skirt and brim")]          = create_scaled_bitmap(nullptr, "skirt+brim"); 
+//         CATEGORY_ICON[L("Speed > Acceleration")]    = create_scaled_bitmap(nullptr, "time");
+        CATEGORY_ICON[L("Advanced")]                 = create_scaled_bitmap(nullptr, "wrench");
+        // ptSLA
+        CATEGORY_ICON[L("Supports")]                 = create_scaled_bitmap(nullptr, "support"/*"sla_supports"*/);
+        CATEGORY_ICON[L("Pad")]                      = create_scaled_bitmap(nullptr, "pad");
+    }
 }
 
 
@@ -463,8 +507,7 @@ void ObjectList::paste_volumes_into_list(int obj_idx, const ModelVolumePtrs& vol
         items.Add(vol_item);
     }
 
-    m_parts_changed = true;
-    parts_changed(obj_idx);
+    changed_object(obj_idx);
 
     if (items.size() > 1)
     {
@@ -490,9 +533,7 @@ void ObjectList::paste_objects_into_list(const std::vector<size_t>& object_idxs)
         items.Add(m_objects_model->GetItemById(object));
     }
 
-    m_parts_changed = true;
     wxGetApp().plater()->changed_objects(object_idxs);
-    m_parts_changed = false;
 
     select_items(items);
 #ifndef __WXOSX__ //#ifdef __WXMSW__ // #ys_FIXME
@@ -534,7 +575,7 @@ void ObjectList::OnContextMenu(wxDataViewEvent&)
     if (title == " ")
         show_context_menu();
     else if (title == _("Name") && pt.x >15 &&
-             m_objects_model->GetBitmap(item).GetRefData() == m_bmp_manifold_warning.GetRefData())
+             m_objects_model->GetBitmap(item).GetRefData() == m_bmp_manifold_warning.bmp().GetRefData())
     {
         if (is_windows10())
             fix_through_netfabb();
@@ -703,8 +744,7 @@ void ObjectList::OnDrop(wxDataViewEvent &event)
     select_item(m_objects_model->ReorganizeChildren(from_volume_id, to_volume_id,
                                                     m_objects_model->GetParent(item)));
 
-    m_parts_changed = true;
-    parts_changed(m_dragged_data.obj_idx());
+    changed_object(m_dragged_data.obj_idx());
 
     m_dragged_data.clear();
 }
@@ -1000,12 +1040,12 @@ void ObjectList::append_menu_items_add_volume(wxMenu* menu)
 wxMenuItem* ObjectList::append_menu_item_split(wxMenu* menu) 
 {
     return append_menu_item(menu, wxID_ANY, _(L("Split to parts")), "",
-        [this](wxCommandEvent&) { split(); }, m_bmp_split, menu);
+        [this](wxCommandEvent&) { split(); }, m_bmp_split.bmp(), menu);
 }
 
 wxMenuItem* ObjectList::append_menu_item_settings(wxMenu* menu_) 
 {
-    PrusaMenu* menu = dynamic_cast<PrusaMenu*>(menu_);
+    MenuWithSeparators* menu = dynamic_cast<MenuWithSeparators*>(menu_);
 
     const wxString menu_name = _(L("Add settings"));
     // Delete old items from settings popupmenu
@@ -1053,7 +1093,7 @@ wxMenuItem* ObjectList::append_menu_item_settings(wxMenu* menu_)
 
     if (printer_technology() == ptFFF ||
         menu->GetMenuItems().size() > 0 && !menu->GetMenuItems().back()->IsSeparator())
-        menu->m_separator_frst = menu->AppendSeparator();
+        menu->SetFirstSeparator();
 
     // Add frequently settings
     create_freq_settings_popupmenu(menu);
@@ -1061,11 +1101,11 @@ wxMenuItem* ObjectList::append_menu_item_settings(wxMenu* menu_)
     if (mode == comAdvanced)
         return nullptr;
 
-    menu->m_separator_scnd = menu->AppendSeparator();
+    menu->SetSecondSeparator();
 
     // Add full settings list
     auto  menu_item = new wxMenuItem(menu, wxID_ANY, menu_name);
-    menu_item->SetBitmap(m_bmp_cog);
+    menu_item->SetBitmap(m_bmp_cog.bmp());
 
     menu_item->SetSubMenu(create_settings_popupmenu(menu));
 
@@ -1290,7 +1330,7 @@ void ObjectList::load_subobject(ModelVolumeType type)
     wxArrayString part_names;
     load_part((*m_objects)[obj_idx], part_names, type);
 
-    parts_changed(obj_idx);
+    changed_object(obj_idx);
 
     for (int i = 0; i < part_names.size(); ++i) {
         const wxDataViewItem sel_item = m_objects_model->AddVolumeChild(item, part_names.Item(i), type);
@@ -1306,7 +1346,6 @@ void ObjectList::load_part( ModelObject* model_object,
 {
     wxWindow* parent = wxGetApp().tab_panel()->GetPage(0);
 
-    m_parts_changed = false;
     wxArrayString input_files;
     wxGetApp().import_model(parent, input_files);
     for (int i = 0; i < input_files.size(); ++i) {
@@ -1342,8 +1381,6 @@ void ObjectList::load_part( ModelObject* model_object,
 
                 // set a default extruder value, since user can't add it manually
                 new_volume->config.set_key_value("extruder", new ConfigOptionInt(0));
-
-                m_parts_changed = true;
             }
         }
     }
@@ -1493,8 +1530,7 @@ void ObjectList::load_generic_subobject(const std::string& type_name, const Mode
     // set a default extruder value, since user can't add it manually
     new_volume->config.set_key_value("extruder", new ConfigOptionInt(0));
 
-    m_parts_changed = true;
-    parts_changed(obj_idx);
+    changed_object(obj_idx);
 
     const auto object_item = m_objects_model->GetTopParent(GetSelection());
     select_item(m_objects_model->AddVolumeChild(object_item, name, type));
@@ -1558,8 +1594,7 @@ void ObjectList::del_instances_from_object(const int obj_idx)
 
     (*m_objects)[obj_idx]->invalidate_bounding_box(); // ? #ys_FIXME
 
-    m_parts_changed = true;
-    parts_changed(obj_idx);
+    changed_object(obj_idx);
 }
 
 bool ObjectList::del_subobject_from_object(const int obj_idx, const int idx, const int type)
@@ -1604,8 +1639,7 @@ bool ObjectList::del_subobject_from_object(const int obj_idx, const int idx, con
     else
         return false;
 
-    m_parts_changed = true;
-    parts_changed(obj_idx);
+    changed_object(obj_idx);
 
     return true;
 }
@@ -1655,8 +1689,7 @@ void ObjectList::split()
     if (parent == item)
         Expand(parent);
 
-    m_parts_changed = true;
-    parts_changed(obj_idx);
+    changed_object(obj_idx);
 }
 
 bool ObjectList::get_volume_by_item(const wxDataViewItem& item, ModelVolume*& volume)
@@ -1713,17 +1746,10 @@ bool ObjectList::can_split_instances()
     return selection.is_multiple_full_instance() || selection.is_single_full_instance();
 }
 
-void ObjectList::part_settings_changed()
+// NO_PARAMETERS function call means that changed object index will be determine from Selection() 
+void ObjectList::changed_object(const int obj_idx/* = -1*/) const 
 {
-    m_part_settings_changed = true;
-    wxGetApp().plater()->changed_object(get_selected_obj_idx());
-    m_part_settings_changed = false;
-}
-
-void ObjectList::parts_changed(int obj_idx)
-{
-    wxGetApp().plater()->changed_object(obj_idx);
-    m_parts_changed = false;
+    wxGetApp().plater()->changed_object(obj_idx < 0 ? get_selected_obj_idx() : obj_idx);
 }
 
 void ObjectList::part_selection_changed()
@@ -1826,7 +1852,7 @@ void ObjectList::add_object_to_list(size_t obj_idx)
         stats.facets_added + stats.facets_reversed + stats.backwards_edges;
     if (errors > 0) {
         wxVariant variant;
-        variant << PrusaDataViewBitmapText(item_name, m_bmp_manifold_warning);
+        variant << DataViewBitmapText(item_name, m_bmp_manifold_warning.bmp());
         m_objects_model->SetValue(variant, item, 0);
     }
 
@@ -2446,8 +2472,7 @@ void ObjectList::change_part_type()
     volume->set_type(new_type);
     m_objects_model->SetVolumeType(item, new_type);
 
-    m_parts_changed = true;
-    parts_changed(get_selected_obj_idx());
+    changed_object(get_selected_obj_idx());
 
     // Update settings showing, if we have it
     //(we show additional settings for Part and Modifier and hide it for Support Blocker/Enforcer)
@@ -2627,7 +2652,7 @@ void ObjectList::rename_item()
     wxVariant valueOld;
     m_objects_model->GetValue(valueOld, item, 0);
 
-    PrusaDataViewBitmapText bmpText;
+    DataViewBitmapText bmpText;
     bmpText << valueOld;
 
     // But replace the text with the value entered by user.
@@ -2675,11 +2700,29 @@ void ObjectList::update_item_error_icon(const int obj_idx, const int vol_idx) co
     if (errors == 0) {
         // delete Error_icon if all errors are fixed
         wxVariant variant;
-        variant << PrusaDataViewBitmapText(from_u8(model_object->name), wxNullBitmap);
+        variant << DataViewBitmapText(from_u8(model_object->name), wxNullBitmap);
         m_objects_model->SetValue(variant, item, 0);
     }
 }
 
+void ObjectList::msw_rescale()
+{
+    // update min size !!! A width of control shouldn't be a wxDefaultCoord
+    SetMinSize(wxSize(1, 15 * wxGetApp().em_unit()));
+
+    GetColumn(0)->SetWidth(19 * wxGetApp().em_unit());
+    GetColumn(1)->SetWidth(8 * wxGetApp().em_unit());
+    GetColumn(2)->SetWidth(int(2 * wxGetApp().em_unit()));
+
+    // rescale all icons, used by ObjectList
+    rescale_icons();
+
+    // rescale/update existingitems with bitmaps
+    m_objects_model->Rescale();
+
+    Layout();
+}
+
 void ObjectList::ItemValueChanged(wxDataViewEvent &event)
 {
     if (event.GetColumn() == 0)
@@ -2693,7 +2736,7 @@ void ObjectList::OnEditingDone(wxDataViewEvent &event)
     if (event.GetColumn() != 0)
         return;
 
-    const auto renderer = dynamic_cast<PrusaBitmapTextRenderer*>(GetColumn(0)->GetRenderer());
+    const auto renderer = dynamic_cast<BitmapTextRenderer*>(GetColumn(0)->GetRenderer());
 
     if (renderer->WasCanceled())
         show_error(this, _(L("The supplied name is not valid;")) + "\n" +
diff --git a/src/slic3r/GUI/GUI_ObjectList.hpp b/src/slic3r/GUI/GUI_ObjectList.hpp
index a0343100a..da082d1d4 100644
--- a/src/slic3r/GUI/GUI_ObjectList.hpp
+++ b/src/slic3r/GUI/GUI_ObjectList.hpp
@@ -13,8 +13,8 @@
 
 class wxBoxSizer;
 class wxMenuItem;
-class PrusaObjectDataViewModel;
-class PrusaMenu;
+class ObjectDataViewModel;
+class MenuWithSeparators;
 
 namespace Slic3r {
 class ConfigOptionsGroup;
@@ -108,18 +108,18 @@ class ObjectList : public wxDataViewCtrl
     wxBoxSizer          *m_sizer {nullptr};
     wxWindow            *m_parent {nullptr};
 
-    wxBitmap	m_bmp_modifiermesh;
-    wxBitmap	m_bmp_solidmesh;
-    wxBitmap	m_bmp_support_enforcer;
-    wxBitmap	m_bmp_support_blocker;
-    wxBitmap	m_bmp_manifold_warning;
-    wxBitmap	m_bmp_cog;
-    wxBitmap	m_bmp_split;
+    ScalableBitmap	    m_bmp_modifiermesh;
+    ScalableBitmap	    m_bmp_solidmesh;
+    ScalableBitmap	    m_bmp_support_enforcer;
+    ScalableBitmap	    m_bmp_support_blocker;
+    ScalableBitmap	    m_bmp_manifold_warning;
+    ScalableBitmap	    m_bmp_cog;
+    ScalableBitmap	    m_bmp_split;
 
-    PrusaMenu   m_menu_object;
-    PrusaMenu   m_menu_part;
-    PrusaMenu   m_menu_sla_object;
-    PrusaMenu   m_menu_instance;
+    MenuWithSeparators  m_menu_object;
+    MenuWithSeparators  m_menu_part;
+    MenuWithSeparators  m_menu_sla_object;
+    MenuWithSeparators  m_menu_instance;
     wxMenuItem* m_menu_item_split { nullptr };
     wxMenuItem* m_menu_item_split_part { nullptr };
     wxMenuItem* m_menu_item_settings { nullptr };
@@ -139,9 +139,6 @@ class ObjectList : public wxDataViewCtrl
                                                            // update_settings_items - updating canvas selection is undesirable,
                                                            // because it would turn off the gizmos (mainly a problem for the SLA gizmo)
 
-    bool        m_parts_changed = false;
-    bool        m_part_settings_changed = false;
-
     int         m_selected_row = 0;
     wxDataViewItem m_last_selected_item {nullptr};
 
@@ -157,7 +154,7 @@ public:
 
     std::map<std::string, wxBitmap> CATEGORY_ICON;
 
-    PrusaObjectDataViewModel	*m_objects_model{ nullptr };
+    ObjectDataViewModel	*m_objects_model{ nullptr };
     DynamicPrintConfig          *m_config {nullptr};
 
     std::vector<ModelObject*>   *m_objects{ nullptr };
@@ -176,6 +173,7 @@ public:
     void                update_extruder_values_for_items(const int max_extruder);
 
     void                init_icons();
+    void                rescale_icons();
 
     void                set_tooltip_for_item(const wxPoint& pt);
 
@@ -225,11 +223,8 @@ public:
     wxBoxSizer*         get_sizer() {return  m_sizer;}
     int                 get_selected_obj_idx() const;
     DynamicPrintConfig& get_item_config(const wxDataViewItem& item) const;
-    bool                is_parts_changed() const { return m_parts_changed; }
-    bool                is_part_settings_changed() const { return m_part_settings_changed; }
-    void                part_settings_changed();
 
-    void                parts_changed(int obj_idx);
+    void                changed_object(const int obj_idx = -1) const;
     void                part_selection_changed();
 
     // Add object to the list
@@ -291,6 +286,8 @@ public:
     void paste_volumes_into_list(int obj_idx, const ModelVolumePtrs& volumes);
     void paste_objects_into_list(const std::vector<size_t>& object_idxs);
 
+    void msw_rescale();
+
 private:
     void OnChar(wxKeyEvent& event);
     void OnContextMenu(wxDataViewEvent &event);
diff --git a/src/slic3r/GUI/GUI_ObjectManipulation.cpp b/src/slic3r/GUI/GUI_ObjectManipulation.cpp
index f9284a19b..53f1923fd 100644
--- a/src/slic3r/GUI/GUI_ObjectManipulation.cpp
+++ b/src/slic3r/GUI/GUI_ObjectManipulation.cpp
@@ -23,7 +23,7 @@ ObjectManipulation::ObjectManipulation(wxWindow* parent) :
 #endif // __APPLE__
 {
     m_og->set_name(_(L("Object Manipulation")));
-    m_og->label_width = 12 * wxGetApp().em_unit();//125;
+    m_og->label_width = 12;//125;
     m_og->set_grid_vgap(5);
     
     m_og->m_on_change = std::bind(&ObjectManipulation::on_change, this, std::placeholders::_1, std::placeholders::_2);
@@ -45,11 +45,11 @@ ObjectManipulation::ObjectManipulation(wxWindow* parent) :
     def.label = L("Name");
     def.gui_type = "legend";
     def.tooltip = L("Object name");
-    def.width = 21 * wxGetApp().em_unit();
+    def.width = 21;
     def.default_value = new ConfigOptionString{ " " };
     m_og->append_single_option_line(Option(def, "object_name"));
 
-    const int field_width = 5 * wxGetApp().em_unit()/*50*/;
+    const int field_width = 5;
 
     // Legend for object modification
     auto line = Line{ "", "" };
@@ -78,7 +78,7 @@ ObjectManipulation::ObjectManipulation(wxWindow* parent) :
         // Add "uniform scaling" button in front of "Scale" option 
         if (option_name == "Scale") {
             line.near_label_widget = [this](wxWindow* parent) {
-                auto btn = new PrusaLockButton(parent, wxID_ANY);
+                auto btn = new LockButton(parent, wxID_ANY);
                 btn->Bind(wxEVT_BUTTON, [btn, this](wxCommandEvent &event){
                     event.Skip();
                     wxTheApp->CallAfter([btn, this]() { set_uniform_scaling(btn->IsLocked()); });
@@ -117,15 +117,13 @@ ObjectManipulation::ObjectManipulation(wxWindow* parent) :
     m_og->append_line(add_og_to_object_settings(L("Scale"), "%"), &m_scale_Label);
     m_og->append_line(add_og_to_object_settings(L("Size"), "mm"));
 
-    /* Unused parameter at this time
-    def.label = L("Place on bed");
-    def.type = coBool;
-    def.tooltip = L("Automatic placing of models on printing bed in Y axis");
-    def.gui_type = "";
-    def.sidetext = "";
-    def.default_value = new ConfigOptionBool{ false };
-    m_og->append_single_option_line(Option(def, "place_on_bed"));
-    */
+    // call back for a rescale of button "Set uniform scale"
+    m_og->rescale_near_label_widget = [this](wxWindow* win) {
+        auto *ctrl = dynamic_cast<LockButton*>(win);
+        if (ctrl == nullptr)
+            return;
+        ctrl->msw_rescale();
+    };
 }
 
 void ObjectManipulation::Show(const bool show)
diff --git a/src/slic3r/GUI/GUI_ObjectManipulation.hpp b/src/slic3r/GUI/GUI_ObjectManipulation.hpp
index a5a180a56..d7b45e3c8 100644
--- a/src/slic3r/GUI/GUI_ObjectManipulation.hpp
+++ b/src/slic3r/GUI/GUI_ObjectManipulation.hpp
@@ -7,7 +7,7 @@
 #include "GLCanvas3D.hpp"
 
 class wxStaticText;
-class PrusaLockButton;
+class LockButton;
 
 namespace Slic3r {
 namespace GUI {
@@ -76,7 +76,7 @@ class ObjectManipulation : public OG_Settings
     Vec3d           m_new_size;
     bool            m_new_enabled;
     bool            m_uniform_scale {true};
-    PrusaLockButton* m_lock_bnt{ nullptr };
+    LockButton*     m_lock_bnt{ nullptr };
 
 #ifndef __APPLE__
     // Currently focused option name (empty if none)
diff --git a/src/slic3r/GUI/GUI_ObjectSettings.cpp b/src/slic3r/GUI/GUI_ObjectSettings.cpp
index 72eeb76de..b7ba2d4fc 100644
--- a/src/slic3r/GUI/GUI_ObjectSettings.cpp
+++ b/src/slic3r/GUI/GUI_ObjectSettings.cpp
@@ -59,6 +59,8 @@ ObjectSettings::ObjectSettings(wxWindow* parent) :
 
     m_settings_list_sizer = new wxBoxSizer(wxVERTICAL);
     m_og->sizer->Add(m_settings_list_sizer, 1, wxEXPAND | wxLEFT, 5);
+
+    m_bmp_delete = ScalableBitmap(parent, "cross");
 }
 
 void ObjectSettings::update_settings_list()
@@ -77,14 +79,11 @@ void ObjectSettings::update_settings_list()
 		{
 			auto opt_key = (line.get_options())[0].opt_id;  //we assume that we have one option per line
 
-			auto btn = new wxBitmapButton(parent, wxID_ANY, create_scaled_bitmap(m_parent, "cross"/*"colorchange_delete_on.png"*/),
-				wxDefaultPosition, wxDefaultSize, wxBORDER_NONE);
-#ifdef __WXMSW__
-            btn->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-#endif // __WXMSW__
+			auto btn = new ScalableButton(parent, wxID_ANY, m_bmp_delete);
+
 			btn->Bind(wxEVT_BUTTON, [opt_key, config, this](wxEvent &event) {
 				config->erase(opt_key);
-                wxGetApp().obj_list()->part_settings_changed();
+                wxGetApp().obj_list()->changed_object();
                 wxTheApp->CallAfter([this]() {
                     wxWindowUpdateLocker noUpdates(m_parent);
                     update_settings_list(); 
@@ -123,22 +122,31 @@ void ObjectSettings::update_settings_list()
                     continue;
 
                 auto optgroup = std::make_shared<ConfigOptionsGroup>(m_og->ctrl_parent(), cat.first, config, false, extra_column);
-                optgroup->label_width = 15 * wxGetApp().em_unit();
-                optgroup->sidetext_width = 5.5 * wxGetApp().em_unit();
+                optgroup->label_width = 15;
+                optgroup->sidetext_width = 5.5;
 
                 optgroup->m_on_change = [](const t_config_option_key& opt_id, const boost::any& value) {
-                                        wxGetApp().obj_list()->part_settings_changed(); };
+                                        wxGetApp().obj_list()->changed_object(); };
 
                 for (auto& opt : cat.second)
                 {
                     if (opt == "extruder")
                         continue;
                     Option option = optgroup->get_option(opt);
-                    option.opt.width = 12 * wxGetApp().em_unit();
+                    option.opt.width = 12;
                     optgroup->append_single_option_line(option);
                 }
                 optgroup->reload_config();
                 m_settings_list_sizer->Add(optgroup->sizer, 0, wxEXPAND | wxALL, 0);
+
+                // call back for rescaling of the extracolumn control
+                optgroup->rescale_extra_column_item = [this](wxWindow* win) {
+                    auto *ctrl = dynamic_cast<ScalableButton*>(win);
+                    if (ctrl == nullptr)
+                        return;
+                    ctrl->SetBitmap_(m_bmp_delete);
+                };
+
                 m_og_settings.push_back(optgroup);
 
                 categories.push_back(cat.first);
@@ -163,5 +171,13 @@ void ObjectSettings::UpdateAndShow(const bool show)
     OG_Settings::UpdateAndShow(show);
 }
 
+void ObjectSettings::msw_rescale()
+{
+    m_bmp_delete.msw_rescale();
+
+    for (auto group : m_og_settings)
+        group->msw_rescale();
+}
+
 } //namespace GUI
 } //namespace Slic3r 
\ No newline at end of file
diff --git a/src/slic3r/GUI/GUI_ObjectSettings.hpp b/src/slic3r/GUI/GUI_ObjectSettings.hpp
index 12115e208..3d49f13b7 100644
--- a/src/slic3r/GUI/GUI_ObjectSettings.hpp
+++ b/src/slic3r/GUI/GUI_ObjectSettings.hpp
@@ -4,6 +4,7 @@
 #include <memory>
 #include <vector>
 #include <wx/panel.h>
+#include "wxExtensions.hpp"
 
 class wxBoxSizer;
 
@@ -37,12 +38,15 @@ class ObjectSettings : public OG_Settings
     // option groups for settings
     std::vector <std::shared_ptr<ConfigOptionsGroup>> m_og_settings;
 
+    ScalableBitmap m_bmp_delete;
+
 public:
     ObjectSettings(wxWindow* parent);
     ~ObjectSettings() {}
 
     void        update_settings_list();
     void        UpdateAndShow(const bool show) override;
+    void        msw_rescale();
 };
 
 }}
diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp
index 206253451..88fea933e 100644
--- a/src/slic3r/GUI/GUI_Preview.cpp
+++ b/src/slic3r/GUI/GUI_Preview.cpp
@@ -396,6 +396,18 @@ void Preview::refresh_print()
     load_print(true);
 }
 
+void Preview::msw_rescale()
+{
+    // rescale slider
+    if (m_slider) m_slider->msw_rescale();
+
+    // rescale warning legend on the canvas
+    get_canvas3d()->msw_rescale();
+
+    // rescale legend
+    refresh_print();
+}
+
 void Preview::bind_event_handlers()
 {
     this->Bind(wxEVT_SIZE, &Preview::on_size, this);
@@ -507,7 +519,7 @@ void Preview::on_checkbox_shells(wxCommandEvent& evt)
 
 void Preview::create_double_slider()
 {
-    m_slider = new PrusaDoubleSlider(this, wxID_ANY, 0, 0, 0, 100);
+    m_slider = new DoubleSlider(this, wxID_ANY, 0, 0, 0, 100);
     m_double_slider_sizer->Add(m_slider, 0, wxEXPAND, 0);
 
     // sizer, m_canvas_widget
diff --git a/src/slic3r/GUI/GUI_Preview.hpp b/src/slic3r/GUI/GUI_Preview.hpp
index a2929f2e6..2540980f4 100644
--- a/src/slic3r/GUI/GUI_Preview.hpp
+++ b/src/slic3r/GUI/GUI_Preview.hpp
@@ -13,7 +13,7 @@ class wxStaticText;
 class wxChoice;
 class wxComboCtrl;
 class wxCheckBox;
-class PrusaDoubleSlider;
+class DoubleSlider;
 
 namespace Slic3r {
 
@@ -99,7 +99,7 @@ class Preview : public wxPanel
     bool m_loaded;
     bool m_enabled;
 
-    PrusaDoubleSlider* m_slider {nullptr};
+    DoubleSlider* m_slider {nullptr};
 
 public:
     Preview(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model, DynamicPrintConfig* config, 
@@ -120,6 +120,8 @@ public:
     void reload_print(bool keep_volumes = false);
     void refresh_print();
 
+    void msw_rescale();
+
 private:
     bool init(wxWindow* parent, Bed3D& bed, Camera& camera, GLToolbar& view_toolbar, Model* model);
 
diff --git a/src/slic3r/GUI/GUI_Utils.hpp b/src/slic3r/GUI/GUI_Utils.hpp
index e12153625..25cf25b16 100644
--- a/src/slic3r/GUI/GUI_Utils.hpp
+++ b/src/slic3r/GUI/GUI_Utils.hpp
@@ -16,6 +16,7 @@
 #include <wx/panel.h>
 #include <wx/dcclient.h>
 #include <wx/debug.h>
+#include <wx/settings.h>
 
 class wxCheckBox;
 class wxTopLevelWindow;
@@ -58,35 +59,119 @@ public:
         : P(parent, id, title, pos, size, style, name)
     {
         m_scale_factor = (float)get_dpi_for_window(this) / (float)DPI_DEFAULT;
+        m_normal_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        // An analog of em_unit value from GUI_App.
+        m_em_unit = std::max<size_t>(10, 10 * m_scale_factor);
+
+        m_prev_scale_factor = m_scale_factor;
+
         recalc_font();
 
         this->Bind(EVT_DPI_CHANGED, [this](const DpiChangedEvent &evt) {
             m_scale_factor = (float)evt.dpi / (float)DPI_DEFAULT;
-            on_dpi_changed(evt.rect);
+
+            if (!m_can_rescale)
+                return;
+
+            if (is_new_scale_factor())
+                rescale(evt.rect);
+        });
+
+        this->Bind(wxEVT_MOVE_START, [this](wxMoveEvent& event)
+        {
+            event.Skip();
+
+            // Suppress application rescaling, when a MainFrame moving is not ended
+            m_can_rescale = false;
+        });
+
+        this->Bind(wxEVT_MOVE_END, [this](wxMoveEvent& event)
+        {
+            event.Skip();
+
+            m_can_rescale = is_new_scale_factor();
+
+            // If scale factor is different after moving of MainFrame ...
+            if (m_can_rescale)
+                // ... rescale application
+                rescale(event.GetRect());
+            else
+            // set value to _true_ in purpose of possibility of a display dpi changing from System Settings
+                m_can_rescale = true;
         });
     }
 
     virtual ~DPIAware() {}
 
-    float scale_factor() const { return m_scale_factor; }
-    int em_unit() const { return m_em_unit; }
-    int font_size() const { return m_font_size; }
+    float   scale_factor() const        { return m_scale_factor; }
+    float   prev_scale_factor() const   { return m_prev_scale_factor; }
+
+    int     em_unit() const             { return m_em_unit; }
+    int     font_size() const           { return m_font_size; }
+    const wxFont& normal_font() const   { return m_normal_font; }
 
 protected:
     virtual void on_dpi_changed(const wxRect &suggested_rect) = 0;
 
 private:
-    int m_scale_factor;
+    float m_scale_factor;
     int m_em_unit;
     int m_font_size;
 
+    wxFont m_normal_font;
+    float m_prev_scale_factor;
+    bool  m_can_rescale{ true };
+
     void recalc_font()
     {
         wxClientDC dc(this);
         const auto metrics = dc.GetFontMetrics();
         m_font_size = metrics.height;
-        m_em_unit = metrics.averageWidth;
+//         m_em_unit = metrics.averageWidth;
     }
+
+    // check if new scale is differ from previous
+    bool    is_new_scale_factor() const { return fabs(m_scale_factor - m_prev_scale_factor) > 0.001; }
+
+    // recursive function for scaling fonts for all controls in Window
+    void    scale_controls_fonts(wxWindow *window, const float scale_f)
+    {
+        auto children = window->GetChildren();
+
+        for (auto child : children) {
+            scale_controls_fonts(child, scale_f);
+            child->SetFont(child->GetFont().Scaled(scale_f));
+        }
+
+        window->Layout();
+    }
+
+    void    rescale(const wxRect &suggested_rect)
+    {
+        this->Freeze();
+        const float relative_scale_factor = m_scale_factor / m_prev_scale_factor;
+
+        // rescale fonts of all controls
+        scale_controls_fonts(this, relative_scale_factor);
+        this->SetFont(this->GetFont().Scaled(relative_scale_factor));
+
+
+        // rescale normal_font value
+        m_normal_font = m_normal_font.Scaled(relative_scale_factor);
+
+        // An analog of em_unit value from GUI_App.
+        m_em_unit = std::max<size_t>(10, 10 * m_scale_factor);
+
+        // rescale missed controls sizes and images
+        on_dpi_changed(suggested_rect);
+
+        this->Layout();
+        this->Thaw();
+
+        // reset previous scale factor from current scale factor value
+        m_prev_scale_factor = m_scale_factor;
+    }
+
 };
 
 typedef DPIAware<wxFrame> DPIFrame;
diff --git a/src/slic3r/GUI/KBShortcutsDialog.cpp b/src/slic3r/GUI/KBShortcutsDialog.cpp
index 65abba319..7f77474f2 100644
--- a/src/slic3r/GUI/KBShortcutsDialog.cpp
+++ b/src/slic3r/GUI/KBShortcutsDialog.cpp
@@ -10,26 +10,28 @@ namespace Slic3r {
 namespace GUI {
 
 KBShortcutsDialog::KBShortcutsDialog()
-    : wxDialog(NULL, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _(L("Keyboard Shortcuts")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
+    : DPIDialog(NULL, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _(L("Keyboard Shortcuts")), 
+     wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
-	SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));    
+	SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 
 	auto main_sizer = new wxBoxSizer(wxVERTICAL);
 
     // logo
-	const wxBitmap logo_bmp = create_scaled_bitmap(this, "Slic3r_32px.png", 32);
+    m_logo_bmp = ScalableBitmap(this, "Slic3r_32px.png", 32);
 
     // fonts
-    wxFont head_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold();
+    const wxFont& font = wxGetApp().normal_font();
+    const wxFont& bold_font = wxGetApp().bold_font();   
+    SetFont(font);
+
+    wxFont head_font = bold_font;
 #ifdef __WXOSX__
     head_font.SetPointSize(14);
 #else
-    head_font.SetPointSize(12);
+    head_font.SetPointSize(bold_font.GetPointSize() + 2);
 #endif // __WXOSX__
 
-    const wxFont& font = wxGetApp().small_font();
-    const wxFont& bold_font = wxGetApp().bold_font();
-
     fill_shortcuts();
 
     auto panel = new wxPanel(this);
@@ -43,22 +45,25 @@ KBShortcutsDialog::KBShortcutsDialog()
     wxBoxSizer* r_sizer = new wxBoxSizer(wxVERTICAL);
     main_grid_sizer->Add(r_sizer, 0);
 
+    m_head_bitmaps.reserve(m_full_shortcuts.size());
+    const wxSize topic_size = wxSize(10 * wxGetApp().em_unit(), -1);
+
     for (auto& sc : m_full_shortcuts)
     {
-//         auto sizer = sc.first == _(L("Main Shortcuts")) ? l_sizer : r_sizer;
-        auto sizer = sc.second.second == 0 ? l_sizer : r_sizer;
+        auto sizer = sc.second.second == szLeft ? l_sizer : r_sizer;
         wxBoxSizer* hsizer = new wxBoxSizer(wxHORIZONTAL);
         sizer->Add(hsizer, 0, wxEXPAND | wxTOP | wxBOTTOM, 10);
 
         // logo
-        auto *logo = new wxStaticBitmap(panel, wxID_ANY, logo_bmp);
-        hsizer->Add(logo, 0, wxEXPAND | wxLEFT | wxRIGHT, 15);
+        m_head_bitmaps.push_back(new wxStaticBitmap(panel, wxID_ANY, m_logo_bmp.bmp()));
+        hsizer->Add(m_head_bitmaps.back(), 0, wxEXPAND | wxLEFT | wxRIGHT, 15);
 
         // head
-        wxStaticText* head = new wxStaticText(panel, wxID_ANY, sc.first, wxDefaultPosition, wxSize(20 * wxGetApp().em_unit(), -1));
+        wxStaticText* head = new wxStaticText(panel, wxID_ANY, sc.first, wxDefaultPosition, topic_size);
         head->SetFont(head_font);
         hsizer->Add(head, 0, wxALIGN_CENTER_VERTICAL);
 
+
         // Shortcuts list
         auto grid_sizer = new wxFlexGridSizer(2, 5, 15);
         sizer->Add(grid_sizer, 0, wxEXPAND | wxLEFT| wxRIGHT, 15);
@@ -121,7 +126,7 @@ void KBShortcutsDialog::fill_shortcuts()
     main_shortcuts.push_back(Shortcut("?"               ,L("Show keyboard shortcuts list")));
     main_shortcuts.push_back(Shortcut(ctrl+"LeftMouse"  ,L("Select multiple object/Move multiple object")));
 
-    m_full_shortcuts.push_back(std::make_pair( _(L("Main Shortcuts")), std::make_pair(main_shortcuts, 0) ));
+    m_full_shortcuts.push_back(std::make_pair(_(L("Main Shortcuts")), std::make_pair(main_shortcuts, szLeft)));
 
 
     Shortcuts plater_shortcuts;
@@ -148,7 +153,7 @@ void KBShortcutsDialog::fill_shortcuts()
     plater_shortcuts.push_back(Shortcut("O",        L("Zoom out")));
     plater_shortcuts.push_back(Shortcut("ESC",      L("Unselect gizmo, keep object selection")));
 
-    m_full_shortcuts.push_back(std::make_pair(_(L("Plater Shortcuts")), std::make_pair(plater_shortcuts, 1)));
+    m_full_shortcuts.push_back(std::make_pair(_(L("Plater Shortcuts")), std::make_pair(plater_shortcuts, szRight)));
 
 
 //     Shortcuts gizmo_shortcuts;
@@ -168,7 +173,7 @@ void KBShortcutsDialog::fill_shortcuts()
     preview_shortcuts.push_back(Shortcut("U",               L("Upper Layer")));
     preview_shortcuts.push_back(Shortcut("D",               L("Lower Layer")));
 
-    m_full_shortcuts.push_back(std::make_pair( _(L("Preview Shortcuts")), std::make_pair(preview_shortcuts, 0) ));
+    m_full_shortcuts.push_back(std::make_pair(_(L("Preview Shortcuts")), std::make_pair(preview_shortcuts, szLeft)));
 
 
     Shortcuts layers_slider_shortcuts;
@@ -181,7 +186,23 @@ void KBShortcutsDialog::fill_shortcuts()
     layers_slider_shortcuts.push_back(Shortcut("+",             L("Add color change marker for current layer")));
     layers_slider_shortcuts.push_back(Shortcut("-",             L("Delete color change marker for current layer")));
 
-    m_full_shortcuts.push_back(std::make_pair( _(L("Layers Slider Shortcuts")), std::make_pair(layers_slider_shortcuts, 1) ));
+    m_full_shortcuts.push_back(std::make_pair(_(L("Layers Slider Shortcuts")), std::make_pair(layers_slider_shortcuts, szRight)));
+}
+
+void KBShortcutsDialog::on_dpi_changed(const wxRect &suggested_rect)
+{
+    m_logo_bmp.msw_rescale();
+
+    for (wxStaticBitmap* bmp : m_head_bitmaps)
+        bmp->SetBitmap(m_logo_bmp.bmp());
+
+    const int& em = em_unit();
+    const wxSize& size = wxSize(85 * em, 75 * em);
+
+    SetMinSize(size);
+    SetSize(size);
+
+    Refresh();
 }
 
 void KBShortcutsDialog::onCloseDialog(wxEvent &)
diff --git a/src/slic3r/GUI/KBShortcutsDialog.hpp b/src/slic3r/GUI/KBShortcutsDialog.hpp
index d8905e1ce..66fe7c399 100644
--- a/src/slic3r/GUI/KBShortcutsDialog.hpp
+++ b/src/slic3r/GUI/KBShortcutsDialog.hpp
@@ -5,24 +5,38 @@
 #include <map>
 #include <vector>
 
+#include "GUI_Utils.hpp"
+#include "wxExtensions.hpp"
+
 namespace Slic3r { 
 namespace GUI {
 
-class KBShortcutsDialog : public wxDialog
+class KBShortcutsDialog : public DPIDialog
 {
+    enum PLACED_SIZER_ID
+    {
+        szLeft = 0,
+        szRight
+    };
+
     typedef std::pair<std::string, std::string> Shortcut;
     typedef std::vector< Shortcut >             Shortcuts;
-    typedef std::vector< std::pair<wxString, std::pair<Shortcuts, int>> >   ShortcutsVec;
+    typedef std::vector< std::pair<wxString, std::pair<Shortcuts, PLACED_SIZER_ID>> >   ShortcutsVec;
 
     wxString text_info {wxEmptyString};
 
-    ShortcutsVec m_full_shortcuts;
+    ShortcutsVec    m_full_shortcuts;
+    ScalableBitmap  m_logo_bmp;
+    std::vector<wxStaticBitmap*>    m_head_bitmaps;
 
 public:
     KBShortcutsDialog();
     
     void fill_shortcuts();
 
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override;
+
 private:
     void onCloseDialog(wxEvent &);
 };
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 4814a35d9..ccba1aaaa 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -258,7 +258,30 @@ bool MainFrame::can_delete_all() const
 
 void MainFrame::on_dpi_changed(const wxRect &suggested_rect)
 {
-    // TODO
+    wxGetApp().update_fonts();
+
+    // _strange_ workaround for correct em_unit calculation
+    const int new_em_unit = scale_factor() * 10;
+    wxGetApp().set_em_unit(std::max<size_t>(10, new_em_unit));
+
+    /* Load default preset bitmaps before a tabpanel initialization,
+     * but after filling of an em_unit value
+     */
+    wxGetApp().preset_bundle->load_default_preset_bitmaps(this);
+
+    // update Plater
+    wxGetApp().plater()->msw_rescale();
+
+    // update Tabs
+    for (auto tab : wxGetApp().tabs_list)
+        tab->msw_rescale();
+
+    /* To correct window rendering (especially redraw of a status bar)
+     * we should imitate window resizing.
+     */
+    const wxSize& sz = this->GetSize();
+    this->SetSize(sz.x + 1, sz.y + 1);
+    this->SetSize(sz);
 }
 
 void MainFrame::init_menubar()
diff --git a/src/slic3r/GUI/MainFrame.hpp b/src/slic3r/GUI/MainFrame.hpp
index a5d3a1f6d..a8b2be2bc 100644
--- a/src/slic3r/GUI/MainFrame.hpp
+++ b/src/slic3r/GUI/MainFrame.hpp
@@ -4,6 +4,7 @@
 #include "libslic3r/PrintConfig.hpp"
 
 #include <wx/frame.h>
+#include <wx/settings.h>
 #include <wx/string.h>
 
 #include <string>
diff --git a/src/slic3r/GUI/MsgDialog.cpp b/src/slic3r/GUI/MsgDialog.cpp
index 771599b8e..1de0baff7 100644
--- a/src/slic3r/GUI/MsgDialog.cpp
+++ b/src/slic3r/GUI/MsgDialog.cpp
@@ -25,12 +25,14 @@ namespace GUI {
 
 MsgDialog::MsgDialog(wxWindow *parent, const wxString &title, const wxString &headline, wxWindowID button_id, wxBitmap bitmap)
 	: wxDialog(parent, wxID_ANY, title, wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
-	, boldfont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT))
+	, boldfont(wxGetApp().normal_font()/*wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)*/)
 	, content_sizer(new wxBoxSizer(wxVERTICAL))
 	, btn_sizer(new wxBoxSizer(wxHORIZONTAL))
 {
 	boldfont.SetWeight(wxFONTWEIGHT_BOLD);
 
+    this->SetFont(wxGetApp().normal_font());
+
 	auto *topsizer = new wxBoxSizer(wxHORIZONTAL);
 	auto *rightsizer = new wxBoxSizer(wxVERTICAL);
 
diff --git a/src/slic3r/GUI/OptionsGroup.cpp b/src/slic3r/GUI/OptionsGroup.cpp
index df2f7b582..fdbe3b038 100644
--- a/src/slic3r/GUI/OptionsGroup.cpp
+++ b/src/slic3r/GUI/OptionsGroup.cpp
@@ -166,8 +166,11 @@ void OptionsGroup::append_line(const Line& line, wxStaticText**	full_Label/* = n
 #endif /* __WXGTK__ */
 
 	// if we have an extra column, build it
-	if (extra_column)
-		grid_sizer->Add(extra_column(this->ctrl_parent(), line), 0, wxALIGN_CENTER_VERTICAL|wxRIGHT, 3);
+        if (extra_column)
+        {
+            m_extra_column_item_ptrs.push_back(extra_column(this->ctrl_parent(), line));
+            grid_sizer->Add(m_extra_column_item_ptrs.back(), 0, wxALIGN_CENTER_VERTICAL | wxRIGHT, 3);
+        }
 
     // Build a label if we have it
 	wxStaticText* label=nullptr;
@@ -180,21 +183,25 @@ void OptionsGroup::append_line(const Line& line, wxStaticText**	full_Label/* = n
 		label_style |= staticbox ? 0 : wxST_ELLIPSIZE_END;
 #endif /* __WXGTK__ */
 		label = new wxStaticText(this->ctrl_parent(), wxID_ANY, line.label + (line.label.IsEmpty() ? "" : ": "), 
-							wxDefaultPosition, wxSize(label_width, -1), label_style);
+							wxDefaultPosition, wxSize(label_width*wxGetApp().em_unit(), -1), label_style);
 		label->SetBackgroundStyle(wxBG_STYLE_PAINT);
-        label->SetFont(label_font);
-        label->Wrap(label_width); // avoid a Linux/GTK bug
+        label->SetFont(wxGetApp().normal_font());
+        label->Wrap(label_width*wxGetApp().em_unit()); // avoid a Linux/GTK bug
         if (!line.near_label_widget)
             grid_sizer->Add(label, 0, (staticbox ? 0 : wxALIGN_RIGHT | wxRIGHT) | wxALIGN_CENTER_VERTICAL, line.label.IsEmpty() ? 0 : 5);
-        else if (line.near_label_widget && line.label.IsEmpty())
-            grid_sizer->Add(line.near_label_widget(this->ctrl_parent()), 0, wxRIGHT | wxALIGN_CENTER_VERTICAL, 7);
         else {
-            // If we're here, we have some widget near the label
-            // so we need a horizontal sizer to arrange these things
-            auto sizer = new wxBoxSizer(wxHORIZONTAL);
-            grid_sizer->Add(sizer, 0, wxEXPAND | (staticbox ? wxALL : wxBOTTOM | wxTOP | wxLEFT), staticbox ? 0 : 1);
-            sizer->Add(line.near_label_widget(this->ctrl_parent()), 0, wxRIGHT, 7);
-            sizer->Add(label, 0, (staticbox ? 0 : wxALIGN_RIGHT | wxRIGHT) | wxALIGN_CENTER_VERTICAL, 5);
+            m_near_label_widget_ptrs.push_back(line.near_label_widget(this->ctrl_parent()));
+
+            if (line.label.IsEmpty())
+                grid_sizer->Add(m_near_label_widget_ptrs.back(), 0, wxRIGHT | wxALIGN_CENTER_VERTICAL, 7);
+            else {
+                // If we're here, we have some widget near the label
+                // so we need a horizontal sizer to arrange these things
+                auto sizer = new wxBoxSizer(wxHORIZONTAL);
+                grid_sizer->Add(sizer, 0, wxEXPAND | (staticbox ? wxALL : wxBOTTOM | wxTOP | wxLEFT), staticbox ? 0 : 1);
+                sizer->Add(m_near_label_widget_ptrs.back(), 0, wxRIGHT, 7);
+                sizer->Add(label, 0, (staticbox ? 0 : wxALIGN_RIGHT | wxRIGHT) | wxALIGN_CENTER_VERTICAL, 5);
+            }
         }
 		if (line.label_tooltip.compare("") != 0)
 			label->SetToolTip(line.label_tooltip);
@@ -235,14 +242,13 @@ void OptionsGroup::append_line(const Line& line, wxStaticText**	full_Label/* = n
 		wxSizer* sizer_tmp = sizer;
 		// add label if any
 		if (option.label != "") {
-// 			wxString str_label = _(option.label);
 //!			To correct translation by context have to use wxGETTEXT_IN_CONTEXT macro from wxWidget 3.1.1
 			wxString str_label = (option.label == "Top" || option.label == "Bottom") ?
 								_CTX(option.label, "Layers") :
 								_(option.label);
 			label = new wxStaticText(this->ctrl_parent(), wxID_ANY, str_label + ": ", wxDefaultPosition, wxDefaultSize);
 			label->SetBackgroundStyle(wxBG_STYLE_PAINT);
-			label->SetFont(label_font);
+            label->SetFont(wxGetApp().normal_font());
 			sizer_tmp->Add(label, 0, /*wxALIGN_RIGHT |*/ wxALIGN_CENTER_VERTICAL, 0);
 		}
 
@@ -267,9 +273,9 @@ void OptionsGroup::append_line(const Line& line, wxStaticText**	full_Label/* = n
 		// add sidetext if any
 		if (option.sidetext != "") {
 			auto sidetext = new wxStaticText(	this->ctrl_parent(), wxID_ANY, _(option.sidetext), wxDefaultPosition, 
-												wxSize(sidetext_width, -1)/*wxDefaultSize*/, wxALIGN_LEFT);
+												/*wxSize(sidetext_width*wxGetApp().em_unit(), -1)*/wxDefaultSize, wxALIGN_LEFT);
 			sidetext->SetBackgroundStyle(wxBG_STYLE_PAINT);
-			sidetext->SetFont(sidetext_font);
+            sidetext->SetFont(wxGetApp().normal_font());
 			sizer_tmp->Add(sidetext, 0, wxLEFT | wxALIGN_CENTER_VERTICAL, 4);
 			field->set_side_text_ptr(sidetext);
 		}
@@ -478,6 +484,57 @@ bool ConfigOptionsGroup::update_visibility(ConfigOptionMode mode) {
     return true;
 }
 
+void ConfigOptionsGroup::msw_rescale()
+{
+    // update bitmaps for extra column items (like "mode markers" or buttons on settings panel)
+    if (rescale_extra_column_item)
+        for (auto extra_col : m_extra_column_item_ptrs)
+            rescale_extra_column_item(extra_col);
+
+    // update bitmaps for near label widgets (like "Set uniform scale" button on settings panel)
+    if (rescale_near_label_widget)
+        for (auto near_label_widget : m_near_label_widget_ptrs)
+            rescale_near_label_widget(near_label_widget);
+
+    // update undo buttons : rescale bitmaps
+    for (const auto& field : m_fields)
+        field.second->msw_rescale();
+
+    const int em = em_unit(parent());
+
+    // rescale width of label column
+    if (!m_options_mode.empty() && label_width > 1)
+    {
+        const int cols = m_grid_sizer->GetCols();
+        const int rows = m_grid_sizer->GetEffectiveRowsCount();
+        const int label_col = extra_column == nullptr ? 0 : 1;
+
+        for (int i = 0; i < rows; i++)
+        {
+            const wxSizerItem* label_item = m_grid_sizer->GetItem(i*cols+label_col);
+            if (label_item->IsWindow())
+            {
+                auto label = dynamic_cast<wxStaticText*>(label_item->GetWindow());
+                if (label != nullptr) {
+                    label->SetMinSize(wxSize(label_width*em, -1));
+                }
+            }
+            else if (label_item->IsSizer()) // case when we nave near_label_widget
+            {
+                const wxSizerItem* l_item = label_item->GetSizer()->GetItem(1);
+                if (l_item->IsWindow())
+                {
+                    auto label = dynamic_cast<wxStaticText*>(l_item->GetWindow());
+                    if (label != nullptr) {
+                        label->SetMinSize(wxSize(label_width*em, -1));
+                    }
+                }
+            }
+        }
+        m_grid_sizer->Layout();
+    }
+}
+
 boost::any ConfigOptionsGroup::config_value(const std::string& opt_key, int opt_index, bool deserialize) {
 
 	if (deserialize) {
diff --git a/src/slic3r/GUI/OptionsGroup.hpp b/src/slic3r/GUI/OptionsGroup.hpp
index e4ada3692..67875587a 100644
--- a/src/slic3r/GUI/OptionsGroup.hpp
+++ b/src/slic3r/GUI/OptionsGroup.hpp
@@ -72,7 +72,7 @@ private:
     std::vector<widget_t>	m_extra_widgets;//! {std::vector<widget_t>()};
 };
 
-using column_t = std::function<wxWindow*(wxWindow* parent, const Line&)>;//std::function<wxSizer*(const Line&)>;
+using column_t = std::function<wxWindow*(wxWindow* parent, const Line&)>;
 
 using t_optionfield_map = std::map<t_config_option_key, t_field>;
 using t_opt_map = std::map< std::string, std::pair<std::string, int> >;
@@ -82,7 +82,7 @@ class OptionsGroup {
 public:
     const bool		staticbox {true};
     const wxString	title {wxString("")};
-    size_t			label_width = 20 * wxGetApp().em_unit();// {200};
+    size_t			label_width = 20 ;// {200};
     wxSizer*		sizer {nullptr};
     column_t		extra_column {nullptr};
     t_change		m_on_change { nullptr };
@@ -94,6 +94,9 @@ public:
 	std::function<DynamicPrintConfig()>	m_get_sys_config{ nullptr };
 	std::function<bool()>	have_sys_config{ nullptr };
 
+    std::function<void(wxWindow* win)> rescale_extra_column_item { nullptr };
+    std::function<void(wxWindow* win)> rescale_near_label_widget { nullptr };
+    
     wxFont			sidetext_font {wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT) };
     wxFont			label_font {wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT) };
 	int				sidetext_width{ -1 };
@@ -193,6 +196,8 @@ protected:
 	std::map<t_config_option_key, Option>	m_options;
     wxWindow*				m_parent {nullptr};
     std::vector<ConfigOptionMode>           m_options_mode;
+    std::vector<wxWindow*>                  m_extra_column_item_ptrs;
+    std::vector<wxWindow*>                  m_near_label_widget_ptrs;
 
     /// Field list, contains unique_ptrs of the derived type.
     /// using types that need to know what it is beyond the public interface 
@@ -261,6 +266,7 @@ public:
     void        Hide();
     void        Show(const bool show);
     bool        update_visibility(ConfigOptionMode mode);
+    void        msw_rescale();
 	boost::any	config_value(const std::string& opt_key, int opt_index, bool deserialize);
 	// return option value from config 
 	boost::any	get_config_value(const DynamicPrintConfig& config, const std::string& opt_key, int opt_index = -1);
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 8eb68fc39..02cdaf208 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -111,6 +111,7 @@ public:
 
     bool        showing_manifold_warning_icon;
     void        show_sizer(bool show);
+    void        msw_rescale();
 };
 
 ObjectInfo::ObjectInfo(wxWindow *parent) :
@@ -118,10 +119,10 @@ ObjectInfo::ObjectInfo(wxWindow *parent) :
 {
     GetStaticBox()->SetFont(wxGetApp().bold_font());
 
-    auto *grid_sizer = new wxFlexGridSizer(4, 5, 5);
+    auto *grid_sizer = new wxFlexGridSizer(4, 5, 15);
     grid_sizer->SetFlexibleDirection(wxHORIZONTAL);
-    grid_sizer->AddGrowableCol(1, 1);
-    grid_sizer->AddGrowableCol(3, 1);
+//     grid_sizer->AddGrowableCol(1, 1);
+//     grid_sizer->AddGrowableCol(3, 1);
 
     auto init_info_label = [parent, grid_sizer](wxStaticText **info_label, wxString text_label) {
         auto *text = new wxStaticText(parent, wxID_ANY, text_label+":");
@@ -160,6 +161,11 @@ void ObjectInfo::show_sizer(bool show)
         manifold_warning_icon->Show(showing_manifold_warning_icon && show);
 }
 
+void ObjectInfo::msw_rescale()
+{
+    manifold_warning_icon->SetBitmap(create_scaled_bitmap(nullptr, "exclamation"));
+}
+
 enum SlisedInfoIdx
 {
     siFilament_m,
@@ -229,7 +235,8 @@ void SlicedInfo::SetTextAndShow(SlisedInfoIdx idx, const wxString& text, const w
 PresetComboBox::PresetComboBox(wxWindow *parent, Preset::Type preset_type) :
 wxBitmapComboBox(parent, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(15 * wxGetApp().em_unit(), -1), 0, nullptr, wxCB_READONLY),
     preset_type(preset_type),
-    last_selected(wxNOT_FOUND)
+    last_selected(wxNOT_FOUND),
+    m_em_unit(wxGetApp().em_unit())
 {
     Bind(wxEVT_COMBOBOX, [this](wxCommandEvent &evt) {
         auto selected_item = this->GetSelection();
@@ -281,11 +288,7 @@ wxBitmapComboBox(parent, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(15 *
         });
     }
 
-    edit_btn = new wxButton(parent, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-#ifdef __WINDOWS__
-    edit_btn->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-#endif
-    edit_btn->SetBitmap(create_scaled_bitmap(this, "cog"));
+    edit_btn = new ScalableButton(parent, wxID_ANY, "cog");
     edit_btn->SetToolTip(_(L("Click to edit preset")));
 
     edit_btn->Bind(wxEVT_BUTTON, ([preset_type, this](wxCommandEvent)
@@ -331,6 +334,12 @@ void PresetComboBox::check_selection()
     this->last_selected = GetSelection();
 }
 
+void PresetComboBox::msw_rescale()
+{
+    m_em_unit = wxGetApp().em_unit();
+    edit_btn->msw_rescale();
+}
+
 // Frequently changed parameters
 
 class FreqChangedParams : public OG_Settings
@@ -428,7 +437,7 @@ FreqChangedParams::FreqChangedParams(wxWindow* parent, const int label_width) :
 
     option = m_og->get_option("fill_density");
     option.opt.label = L("Infill");
-    option.opt.width = 6 * wxGetApp().em_unit();
+    option.opt.width = 6;
     option.opt.sidetext = "     ";
     line.append_option(option);
 
@@ -566,7 +575,7 @@ struct Sidebar::priv
     wxScrolledWindow *scrolled;
     wxPanel* presets_panel; // Used for MSW better layouts
 
-    PrusaModeSizer  *mode_sizer;
+    ModeSizer  *mode_sizer;
     wxFlexGridSizer *sizer_presets;
     PresetComboBox *combo_print;
     std::vector<PresetComboBox*> combos_filament;
@@ -614,9 +623,9 @@ void Sidebar::priv::show_preset_comboboxes()
 // Sidebar / public
 
 Sidebar::Sidebar(Plater *parent)
-    : wxPanel(parent), p(new priv(parent))
+    : wxPanel(parent, wxID_ANY, wxDefaultPosition, wxSize(40 * wxGetApp().em_unit(), -1)), p(new priv(parent))
 {
-    p->scrolled = new wxScrolledWindow(this, wxID_ANY, wxDefaultPosition, wxSize(40 * wxGetApp().em_unit(), -1));
+    p->scrolled = new wxScrolledWindow(this, wxID_ANY/*, wxDefaultPosition, wxSize(40 * wxGetApp().em_unit(), -1)*/);
     p->scrolled->SetScrollbars(0, 20, 1, 2);
 
 
@@ -625,7 +634,7 @@ Sidebar::Sidebar(Plater *parent)
     p->scrolled->SetSizer(scrolled_sizer);
 
     // Sizer with buttons for mode changing
-    p->mode_sizer = new PrusaModeSizer(p->scrolled, 2 * wxGetApp().em_unit());
+    p->mode_sizer = new ModeSizer(p->scrolled, 2 * wxGetApp().em_unit());
 
     // The preset chooser
     p->sizer_presets = new wxFlexGridSizer(10, 1, 1, 2);
@@ -675,13 +684,8 @@ Sidebar::Sidebar(Plater *parent)
     init_combo(&p->combo_sla_material,  _(L("SLA material")),   Preset::TYPE_SLA_MATERIAL,  false);
     init_combo(&p->combo_printer,       _(L("Printer")),        Preset::TYPE_PRINTER,       false);
 
-    // calculate width of the preset labels 
-//     p->sizer_presets->Layout();
-//     const wxArrayInt& ar = p->sizer_presets->GetColWidths();
-//     const int label_width = ar.IsEmpty() ? 10*wxGetApp().em_unit() : ar.front()-4;
-
     const int margin_5  = int(0.5*wxGetApp().em_unit());// 5;
-    const int margin_10 = int(1.5*wxGetApp().em_unit());// 15;
+    const int margin_10 = 10;//int(1.5*wxGetApp().em_unit());// 15;
 
     p->sizer_params = new wxBoxSizer(wxVERTICAL);
 
@@ -703,10 +707,6 @@ Sidebar::Sidebar(Plater *parent)
     p->object_settings->Hide();
     p->sizer_params->Add(p->object_settings->get_sizer(), 0, wxEXPAND | wxTOP, margin_5);
 
-    p->btn_send_gcode = new wxButton(this, wxID_ANY, _(L("Send to printer")));
-    p->btn_send_gcode->SetFont(wxGetApp().bold_font());
-    p->btn_send_gcode->Hide();
-
     // Info boxes
     p->object_info = new ObjectInfo(p->scrolled);
     p->sliced_info = new SlicedInfo(p->scrolled);
@@ -721,10 +721,17 @@ Sidebar::Sidebar(Plater *parent)
     scrolled_sizer->Add(p->sliced_info, 0, wxEXPAND | wxTOP | wxLEFT, margin_5);
 
     // Buttons underneath the scrolled area
-    p->btn_export_gcode = new wxButton(this, wxID_ANY, _(L("Export G-code")) + dots);
-    p->btn_export_gcode->SetFont(wxGetApp().bold_font());
-    p->btn_reslice = new wxButton(this, wxID_ANY, _(L("Slice now")));
-    p->btn_reslice->SetFont(wxGetApp().bold_font());
+
+    auto init_btn = [this](wxButton **btn, wxString label) {
+        *btn = new wxButton(this, wxID_ANY, label, wxDefaultPosition, 
+                            wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
+        (*btn)->SetFont(wxGetApp().bold_font());
+    };
+
+    init_btn(&p->btn_send_gcode,   _(L("Send to printer")));
+    p->btn_send_gcode->Hide();
+    init_btn(&p->btn_export_gcode, _(L("Export G-code")) + dots);
+    init_btn(&p->btn_reslice,      _(L("Slice now")));
     enable_buttons(false);
 
     auto *btns_sizer = new wxBoxSizer(wxVERTICAL);
@@ -781,6 +788,28 @@ void Sidebar::remove_unused_filament_combos(const int current_extruder_count)
     }
 }
 
+void Sidebar::update_all_preset_comboboxes()
+{
+    PresetBundle &preset_bundle = *wxGetApp().preset_bundle;
+    const auto print_tech = preset_bundle.printers.get_edited_preset().printer_technology();
+
+    // Update the print choosers to only contain the compatible presets, update the dirty flags.
+    if (print_tech == ptFFF)
+        preset_bundle.prints.update_platter_ui(p->combo_print);
+    else {
+        preset_bundle.sla_prints.update_platter_ui(p->combo_sla_print);
+        preset_bundle.sla_materials.update_platter_ui(p->combo_sla_material);
+    }
+    // Update the printer choosers, update the dirty flags.
+    preset_bundle.printers.update_platter_ui(p->combo_printer);
+    // Update the filament choosers to only contain the compatible presets, update the color preview,
+    // update the dirty flags.
+    if (print_tech == ptFFF) {
+        for (size_t i = 0; i < p->combos_filament.size(); ++i)
+            preset_bundle.update_platter_filament_ui(i, p->combos_filament[i]);
+    }
+}
+
 void Sidebar::update_presets(Preset::Type preset_type)
 {
 	PresetBundle &preset_bundle = *wxGetApp().preset_bundle;
@@ -820,23 +849,7 @@ void Sidebar::update_presets(Preset::Type preset_type)
 
 	case Preset::TYPE_PRINTER:
 	{
-//         wxWindowUpdateLocker noUpdates_scrolled(p->scrolled);
-
-		// Update the print choosers to only contain the compatible presets, update the dirty flags.
-        if (print_tech == ptFFF)
-			preset_bundle.prints.update_platter_ui(p->combo_print);
-        else {
-            preset_bundle.sla_prints.update_platter_ui(p->combo_sla_print);
-            preset_bundle.sla_materials.update_platter_ui(p->combo_sla_material);
-        }
-		// Update the printer choosers, update the dirty flags.
-		preset_bundle.printers.update_platter_ui(p->combo_printer);
-		// Update the filament choosers to only contain the compatible presets, update the color preview,
-		// update the dirty flags.
-        if (print_tech == ptFFF) {
-            for (size_t i = 0; i < p->combos_filament.size(); ++ i)
-                preset_bundle.update_platter_filament_ui(i, p->combos_filament[i]);
-		}
+        update_all_preset_comboboxes();
 		p->show_preset_comboboxes();
 		break;
 	}
@@ -861,6 +874,37 @@ void Sidebar::update_reslice_btn_tooltip() const
     p->btn_reslice->SetToolTip(tooltip);
 }
 
+void Sidebar::msw_rescale() 
+{
+    SetMinSize(wxSize(40 * wxGetApp().em_unit(), -1));
+
+    p->mode_sizer->msw_rescale();
+
+    // Rescale preset comboboxes in respect to the current  em_unit ...
+    for (PresetComboBox* combo : std::vector<PresetComboBox*> { p->combo_print,
+                                                                p->combo_sla_print,
+                                                                p->combo_sla_material,
+                                                                p->combo_printer } )
+        combo->msw_rescale();
+    for (PresetComboBox* combo : p->combos_filament)
+        combo->msw_rescale();
+
+    // ... then refill them and set min size to correct layout of the sidebar
+    update_all_preset_comboboxes();
+
+    p->frequently_changed_parameters->get_og(true)->msw_rescale();
+    p->frequently_changed_parameters->get_og(false)->msw_rescale();
+
+    p->object_list->msw_rescale();
+
+    p->object_manipulation->get_og()->msw_rescale();
+    p->object_settings->msw_rescale();
+
+    p->object_info->msw_rescale();
+
+    p->scrolled->Layout();
+}
+
 ObjectManipulation* Sidebar::obj_manipul()
 {
     return p->object_manipulation;
@@ -1132,11 +1176,11 @@ struct Plater::priv
     MainFrame *main_frame;
 
     // Object popup menu
-    PrusaMenu object_menu;
+    MenuWithSeparators object_menu;
     // Part popup menu
-    PrusaMenu part_menu;
+    MenuWithSeparators part_menu;
     // SLA-Object popup menu
-    PrusaMenu sla_object_menu;
+    MenuWithSeparators sla_object_menu;
 
     // Removed/Prepended Items according to the view mode
     std::vector<wxMenuItem*> items_increase;
@@ -3709,22 +3753,16 @@ void Plater::changed_object(int obj_idx)
 {
     if (obj_idx < 0)
         return;
-    auto list = wxGetApp().obj_list();
-    wxASSERT(list != nullptr);
-    if (list == nullptr)
-        return;
-
-    if (list->is_parts_changed()) {
-        // recenter and re - align to Z = 0
-        auto model_object = p->model.objects[obj_idx];
-        model_object->ensure_on_bed();
-        if (this->p->printer_technology == ptSLA) {
-            // Update the SLAPrint from the current Model, so that the reload_scene()
-            // pulls the correct data, update the 3D scene.
-            this->p->update_restart_background_process(true, false);
-        } else
-            p->view3D->reload_scene(false);
+    // recenter and re - align to Z = 0
+    auto model_object = p->model.objects[obj_idx];
+    model_object->ensure_on_bed();
+    if (this->p->printer_technology == ptSLA) {
+        // Update the SLAPrint from the current Model, so that the reload_scene()
+        // pulls the correct data, update the 3D scene.
+        this->p->update_restart_background_process(true, false);
     }
+    else
+        p->view3D->reload_scene(false);
 
     // update print
     this->p->schedule_background_process();
@@ -3735,26 +3773,19 @@ void Plater::changed_objects(const std::vector<size_t>& object_idxs)
     if (object_idxs.empty())
         return;
 
-    auto list = wxGetApp().obj_list();
-    wxASSERT(list != nullptr);
-    if (list == nullptr)
-        return;
-
-    if (list->is_parts_changed()) {
-        for (int obj_idx : object_idxs)
-        {
-            if (obj_idx < p->model.objects.size())
-                // recenter and re - align to Z = 0
-                p->model.objects[obj_idx]->ensure_on_bed();
-        }
-        if (this->p->printer_technology == ptSLA) {
-            // Update the SLAPrint from the current Model, so that the reload_scene()
-            // pulls the correct data, update the 3D scene.
-            this->p->update_restart_background_process(true, false);
-        }
-        else
-            p->view3D->reload_scene(false);
+    for (int obj_idx : object_idxs)
+    {
+        if (obj_idx < p->model.objects.size())
+            // recenter and re - align to Z = 0
+            p->model.objects[obj_idx]->ensure_on_bed();
     }
+    if (this->p->printer_technology == ptSLA) {
+        // Update the SLAPrint from the current Model, so that the reload_scene()
+        // pulls the correct data, update the 3D scene.
+        this->p->update_restart_background_process(true, false);
+    }
+    else
+        p->view3D->reload_scene(false);
 
     // update print
     this->p->schedule_background_process();
@@ -3797,6 +3828,18 @@ bool Plater::can_paste_from_clipboard() const
     return true;
 }
 
+void Plater::msw_rescale()
+{
+    p->preview->msw_rescale();
+
+    p->view3D->get_canvas3d()->msw_rescale();
+
+    p->sidebar->msw_rescale();
+
+    Layout();
+    GetParent()->Layout();
+}
+
 bool Plater::can_delete() const { return p->can_delete(); }
 bool Plater::can_delete_all() const { return p->can_delete_all(); }
 bool Plater::can_increase_instances() const { return p->can_increase_instances(); }
diff --git a/src/slic3r/GUI/Plater.hpp b/src/slic3r/GUI/Plater.hpp
index 5319e3b43..bedc31b35 100644
--- a/src/slic3r/GUI/Plater.hpp
+++ b/src/slic3r/GUI/Plater.hpp
@@ -14,6 +14,7 @@
 #include "GLTexture.hpp"
 
 class wxButton;
+class ScalableButton;
 class wxBoxSizer;
 class wxGLCanvas;
 class wxScrolledWindow;
@@ -46,7 +47,7 @@ public:
     PresetComboBox(wxWindow *parent, Preset::Type preset_type);
     ~PresetComboBox();
 
-    wxButton* edit_btn { nullptr };
+    ScalableButton* edit_btn { nullptr };
 
 	enum LabelItemType {
 		LABEL_ITEM_MARKER = 0x4d,
@@ -56,14 +57,18 @@ public:
     void set_label_marker(int item, LabelItemType label_item_type = LABEL_ITEM_MARKER);
     void set_extruder_idx(const int extr_idx)   { extruder_idx = extr_idx; }
     int  get_extruder_idx() const               { return extruder_idx; }
+    int  em_unit() const                        { return m_em_unit; }
     void check_selection();
 
+    void msw_rescale();
+
 private:
     typedef std::size_t Marker;
 
     Preset::Type preset_type;
     int last_selected;
     int extruder_idx = -1;
+    int m_em_unit;
 };
 
 class Sidebar : public wxPanel
@@ -79,9 +84,11 @@ public:
 
     void init_filament_combo(PresetComboBox **combo, const int extr_idx);
     void remove_unused_filament_combos(const int current_extruder_count);
+    void update_all_preset_comboboxes();
     void update_presets(Slic3r::Preset::Type preset_type);
     void update_mode_sizer() const;
     void update_reslice_btn_tooltip() const;
+    void msw_rescale();
 
     ObjectManipulation*     obj_manipul();
     ObjectList*             obj_list();
@@ -199,6 +206,8 @@ public:
     bool can_copy() const;
     bool can_paste() const;
 
+    void msw_rescale();
+
 private:
     struct priv;
     std::unique_ptr<priv> p;
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index 8bc747db5..69f4e3493 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -7,7 +7,9 @@ namespace Slic3r {
 namespace GUI {
 
 PreferencesDialog::PreferencesDialog(wxWindow* parent) : 
-	wxDialog(parent, wxID_ANY, _(L("Preferences")), wxDefaultPosition, wxDefaultSize) {
+    DPIDialog(parent, wxID_ANY, _(L("Preferences")), wxDefaultPosition, 
+              wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
+{
 	build();
 }
 
@@ -15,7 +17,7 @@ void PreferencesDialog::build()
 {
 	auto app_config = get_app_config();
 	m_optgroup = std::make_shared<ConfigOptionsGroup>(this, _(L("General")));
-    m_optgroup->label_width = 40 * wxGetApp().em_unit(); //400;
+    m_optgroup->label_width = 40;
 	m_optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
 		m_values[opt_key] = boost::any_cast<bool>(value) ? "1" : "0";
 	};
@@ -110,6 +112,8 @@ void PreferencesDialog::build()
 	auto sizer = new wxBoxSizer(wxVERTICAL);
 	sizer->Add(m_optgroup->sizer, 0, wxEXPAND | wxBOTTOM | wxLEFT | wxRIGHT, 10);
 
+    SetFont(wxGetApp().normal_font());
+
 	auto buttons = CreateStdDialogButtonSizer(wxOK | wxCANCEL);
 	wxButton* btn = static_cast<wxButton*>(FindWindowById(wxID_OK, this));
 	btn->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { accept(); });
@@ -138,5 +142,18 @@ void PreferencesDialog::accept()
     wxGetApp().update_ui_from_settings();
 }
 
+void PreferencesDialog::on_dpi_changed(const wxRect &suggested_rect)
+{
+    m_optgroup->msw_rescale();
+
+    const int& em = em_unit();
+    const wxSize& size = wxSize(50 * em, 29 * em);
+
+    SetMinSize(size);
+    SetSize(size);
+
+    Refresh();
+}
+
 } // GUI
 } // Slic3r
\ No newline at end of file
diff --git a/src/slic3r/GUI/Preferences.hpp b/src/slic3r/GUI/Preferences.hpp
index 363daebbc..096a2c906 100644
--- a/src/slic3r/GUI/Preferences.hpp
+++ b/src/slic3r/GUI/Preferences.hpp
@@ -2,6 +2,7 @@
 #define slic3r_Preferences_hpp_
 
 #include "GUI.hpp"
+#include "GUI_Utils.hpp"
 
 #include <wx/dialog.h>
 #include <map>
@@ -11,7 +12,7 @@ namespace GUI {
 
 class ConfigOptionsGroup;
 
-class PreferencesDialog : public wxDialog
+class PreferencesDialog : public DPIDialog
 {
 	std::map<std::string, std::string>	m_values;
 	std::shared_ptr<ConfigOptionsGroup>	m_optgroup;
@@ -21,6 +22,9 @@ public:
 
 	void	build();
 	void	accept();
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override;
 };
 
 } // GUI
diff --git a/src/slic3r/GUI/Preset.cpp b/src/slic3r/GUI/Preset.cpp
index bed960a62..9875586ed 100644
--- a/src/slic3r/GUI/Preset.cpp
+++ b/src/slic3r/GUI/Preset.cpp
@@ -914,6 +914,16 @@ void PresetCollection::update_platter_ui(GUI::PresetComboBox *ui)
 	// and draw a red flag in front of the selected preset.
 	bool wide_icons = ! selected_preset.is_compatible && m_bitmap_incompatible != nullptr;
 
+    /* It's supposed that standard size of an icon is 16px*16px for 100% scaled display.
+    * So set sizes for solid_colored icons used for filament preset
+    * and scale them in respect to em_unit value
+    */
+    const float scale_f = ui->em_unit() * 0.1f;
+    const int icon_height           = 16 * scale_f + 0.5f;
+    const int icon_width            = 16 * scale_f + 0.5f;
+    const int thin_space_icon_width = 4 * scale_f + 0.5f;
+    const int wide_space_icon_width = 6 * scale_f + 0.5f;
+
 	std::map<wxString, wxBitmap*> nonsys_presets;
 	wxString selected = "";
 	if (!this->m_presets.front().is_visible)
@@ -934,13 +944,13 @@ void PresetCollection::update_platter_ui(GUI::PresetComboBox *ui)
 			std::vector<wxBitmap> bmps;
 			if (wide_icons)
 				// Paint a red flag for incompatible presets.
-				bmps.emplace_back(preset.is_compatible ? m_bitmap_cache->mkclear(16, 16) : *m_bitmap_incompatible);
+				bmps.emplace_back(preset.is_compatible ? m_bitmap_cache->mkclear(icon_width, icon_height) : *m_bitmap_incompatible);
 			// Paint the color bars.
-			bmps.emplace_back(m_bitmap_cache->mkclear(4, 16));
+			bmps.emplace_back(m_bitmap_cache->mkclear(thin_space_icon_width, icon_height));
 			bmps.emplace_back(*m_bitmap_main_frame);
 			// Paint a lock at the system presets.
- 			bmps.emplace_back(m_bitmap_cache->mkclear(6, 16));
-			bmps.emplace_back((preset.is_system || preset.is_default) ? *m_bitmap_lock : m_bitmap_cache->mkclear(16, 16));
+			bmps.emplace_back(m_bitmap_cache->mkclear(wide_space_icon_width, icon_height));
+			bmps.emplace_back((preset.is_system || preset.is_default) ? *m_bitmap_lock : m_bitmap_cache->mkclear(icon_width, icon_height));
 			bmp = m_bitmap_cache->insert(bitmap_key, bmps);
 		}
 
@@ -981,12 +991,12 @@ void PresetCollection::update_platter_ui(GUI::PresetComboBox *ui)
 			std::vector<wxBitmap> bmps;
 			if (wide_icons)
 				// Paint a red flag for incompatible presets.
-				bmps.emplace_back(m_bitmap_cache->mkclear(16, 16));
+				bmps.emplace_back(m_bitmap_cache->mkclear(icon_width, icon_height));
 			// Paint the color bars.
-			bmps.emplace_back(m_bitmap_cache->mkclear(4, 16));
+			bmps.emplace_back(m_bitmap_cache->mkclear(thin_space_icon_width, icon_height));
 			bmps.emplace_back(*m_bitmap_main_frame);
 			// Paint a lock at the system presets.
-			bmps.emplace_back(m_bitmap_cache->mkclear(6, 16));
+			bmps.emplace_back(m_bitmap_cache->mkclear(wide_space_icon_width, icon_height));
 			bmps.emplace_back(m_bitmap_add ? *m_bitmap_add : wxNullBitmap);
 			bmp = m_bitmap_cache->insert(bitmap_key, bmps);
 		}
@@ -996,10 +1006,14 @@ void PresetCollection::update_platter_ui(GUI::PresetComboBox *ui)
 	ui->SetSelection(selected_preset_item);
 	ui->SetToolTip(ui->GetString(selected_preset_item));
     ui->check_selection();
-	ui->Thaw();
+    ui->Thaw();
+
+    // Update control min size after rescale (changed Display DPI under MSW)
+    if (ui->GetMinWidth() != 20 * ui->em_unit())
+        ui->SetMinSize(wxSize(20 * ui->em_unit(), ui->GetSize().GetHeight()));
 }
 
-size_t PresetCollection::update_tab_ui(wxBitmapComboBox *ui, bool show_incompatible)
+size_t PresetCollection::update_tab_ui(wxBitmapComboBox *ui, bool show_incompatible, const int em/* = 10*/)
 {
     if (ui == nullptr)
         return 0;
@@ -1007,6 +1021,14 @@ size_t PresetCollection::update_tab_ui(wxBitmapComboBox *ui, bool show_incompati
     ui->Clear();
 	size_t selected_preset_item = 0;
 
+    /* It's supposed that standard size of an icon is 16px*16px for 100% scaled display.
+    * So set sizes for solid_colored(empty) icons used for preset
+    * and scale them in respect to em_unit value
+    */
+    const float scale_f = em * 0.1f;
+    const int icon_height = 16 * scale_f + 0.5f;
+    const int icon_width  = 16 * scale_f + 0.5f;
+
 	std::map<wxString, wxBitmap*> nonsys_presets;
 	wxString selected = "";
 	if (!this->m_presets.front().is_visible)
@@ -1025,7 +1047,7 @@ size_t PresetCollection::update_tab_ui(wxBitmapComboBox *ui, bool show_incompati
 			const wxBitmap* tmp_bmp = preset.is_compatible ? m_bitmap_compatible : m_bitmap_incompatible;
 			bmps.emplace_back((tmp_bmp == 0) ? (m_bitmap_main_frame ? *m_bitmap_main_frame : wxNullBitmap) : *tmp_bmp);
 			// Paint a lock at the system presets.
-			bmps.emplace_back((preset.is_system || preset.is_default) ? *m_bitmap_lock : m_bitmap_cache->mkclear(16, 16));
+			bmps.emplace_back((preset.is_system || preset.is_default) ? *m_bitmap_lock : m_bitmap_cache->mkclear(icon_width, icon_height));
 			bmp = m_bitmap_cache->insert(bitmap_key, bmps);
 		}
 
@@ -1292,6 +1314,11 @@ std::string PresetCollection::path_from_name(const std::string &new_name) const
     return (boost::filesystem::path(m_dir_path) / file_name).make_preferred().string();
 }
 
+void PresetCollection::clear_bitmap_cache()
+{
+    m_bitmap_cache->clear();
+}
+
 wxString PresetCollection::separator(const std::string &label)
 {
 	return wxString::FromUTF8(PresetCollection::separator_head()) + _(label) + wxString::FromUTF8(PresetCollection::separator_tail());
diff --git a/src/slic3r/GUI/Preset.hpp b/src/slic3r/GUI/Preset.hpp
index 41c9ff72b..051a55f66 100644
--- a/src/slic3r/GUI/Preset.hpp
+++ b/src/slic3r/GUI/Preset.hpp
@@ -394,7 +394,7 @@ public:
     // Update the choice UI from the list of presets.
     // If show_incompatible, all presets are shown, otherwise only the compatible presets are shown.
     // If an incompatible preset is selected, it is shown as well.
-    size_t          update_tab_ui(wxBitmapComboBox *ui, bool show_incompatible);
+    size_t          update_tab_ui(wxBitmapComboBox *ui, bool show_incompatible, const int em = 10);
     // Update the choice UI from the list of presets.
     // Only the compatible presets are shown.
     // If an incompatible preset is selected, it is shown as well.
@@ -412,6 +412,8 @@ public:
     // Generate a file path from a profile name. Add the ".ini" suffix if it is missing.
     std::string     path_from_name(const std::string &new_name) const;
 
+    void            clear_bitmap_cache();
+
 #ifdef __linux__
 	static const char* separator_head() { return "------- "; }
 	static const char* separator_tail() { return " -------"; }
diff --git a/src/slic3r/GUI/PresetBundle.cpp b/src/slic3r/GUI/PresetBundle.cpp
index bcf76d958..b2fa0a857 100644
--- a/src/slic3r/GUI/PresetBundle.cpp
+++ b/src/slic3r/GUI/PresetBundle.cpp
@@ -1434,6 +1434,14 @@ bool PresetBundle::parse_color(const std::string &scolor, unsigned char *rgb_out
 
 void PresetBundle::load_default_preset_bitmaps(wxWindow *window)
 {
+    // Clear bitmap cache, before load new scaled default preset bitmaps 
+    m_bitmapCache->clear();
+    this->prints.clear_bitmap_cache();
+    this->sla_prints.clear_bitmap_cache();
+    this->filaments.clear_bitmap_cache();
+    this->sla_materials.clear_bitmap_cache();
+    this->printers.clear_bitmap_cache();
+
     this->prints.load_bitmap_default(window, "cog");
     this->sla_prints.load_bitmap_default(window, "cog");
     this->filaments.load_bitmap_default(window, "spool.png");
@@ -1468,6 +1476,18 @@ void PresetBundle::update_platter_filament_ui(unsigned int idx_extruder, GUI::Pr
 	wxString selected_str = "";
 	if (!this->filaments().front().is_visible)
         ui->set_label_marker(ui->Append(PresetCollection::separator(L("System presets")), wxNullBitmap));
+
+    /* It's supposed that standard size of an icon is 16px*16px for 100% scaled display.
+     * So set sizes for solid_colored icons used for filament preset 
+     * and scale them in respect to em_unit value
+     */
+    const float scale_f = ui->em_unit() * 0.1f;
+    const int icon_height       = 16 * scale_f + 0.5f;
+    const int normal_icon_width = 16 * scale_f + 0.5f;
+    const int space_icon_width  = 2  * scale_f + 0.5f;
+    const int wide_icon_width   = 24 * scale_f + 0.5f;
+    const int thin_icon_width   = 8  * scale_f + 0.5f;
+
 	for (int i = this->filaments().front().is_visible ? 0 : 1; i < int(this->filaments().size()); ++i) {
         const Preset &preset    = this->filaments.preset(i);
         bool          selected  = this->filament_presets[idx_extruder] == preset.name;
@@ -1491,17 +1511,17 @@ void PresetBundle::update_platter_filament_ui(unsigned int idx_extruder, GUI::Pr
             std::vector<wxBitmap> bmps;
             if (wide_icons)
                 // Paint a red flag for incompatible presets.
-                bmps.emplace_back(preset.is_compatible ? m_bitmapCache->mkclear(16, 16) : *m_bitmapIncompatible);
+                bmps.emplace_back(preset.is_compatible ? m_bitmapCache->mkclear(normal_icon_width, icon_height) : *m_bitmapIncompatible);
             // Paint the color bars.
             parse_color(filament_rgb, rgb);
-            bmps.emplace_back(m_bitmapCache->mksolid(single_bar ? 24 : 16, 16, rgb));
+            bmps.emplace_back(m_bitmapCache->mksolid(single_bar ? wide_icon_width : normal_icon_width, icon_height, rgb));
             if (! single_bar) {
                 parse_color(extruder_rgb, rgb);
-                bmps.emplace_back(m_bitmapCache->mksolid(8,  16, rgb));
+                bmps.emplace_back(m_bitmapCache->mksolid(thin_icon_width, icon_height, rgb));
             }
             // Paint a lock at the system presets.
-            bmps.emplace_back(m_bitmapCache->mkclear(2, 16));
-			bmps.emplace_back((preset.is_system || preset.is_default) ? *m_bitmapLock : m_bitmapCache->mkclear(16, 16));
+            bmps.emplace_back(m_bitmapCache->mkclear(space_icon_width, icon_height));
+            bmps.emplace_back((preset.is_system || preset.is_default) ? *m_bitmapLock : m_bitmapCache->mkclear(normal_icon_width, icon_height));
 //                 (preset.is_dirty ? *m_bitmapLockOpen : *m_bitmapLock) : m_bitmapCache->mkclear(16, 16));
             bitmap = m_bitmapCache->insert(bitmap_key, bmps);
 		}
@@ -1536,6 +1556,10 @@ void PresetBundle::update_platter_filament_ui(unsigned int idx_extruder, GUI::Pr
 	ui->SetToolTip(ui->GetString(selected_preset_item));
     ui->check_selection();
     ui->Thaw();
+
+    // Update control min size after rescale (changed Display DPI under MSW)
+    if (ui->GetMinWidth() != 20 * ui->em_unit())
+        ui->SetMinSize(wxSize(20 * ui->em_unit(), ui->GetSize().GetHeight()));
 }
 
 void PresetBundle::set_default_suppressed(bool default_suppressed)
diff --git a/src/slic3r/GUI/PrintHostDialogs.cpp b/src/slic3r/GUI/PrintHostDialogs.cpp
index 76185b1ba..4fb03594b 100644
--- a/src/slic3r/GUI/PrintHostDialogs.cpp
+++ b/src/slic3r/GUI/PrintHostDialogs.cpp
@@ -131,7 +131,7 @@ wxEvent *PrintHostQueueDialog::Event::Clone() const
 }
 
 PrintHostQueueDialog::PrintHostQueueDialog(wxWindow *parent)
-    : wxDialog(parent, wxID_ANY, _(L("Print host upload queue")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
+    : DPIDialog(parent, wxID_ANY, _(L("Print host upload queue")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
     , on_progress_evt(this, EVT_PRINTHOST_PROGRESS, &PrintHostQueueDialog::on_progress, this)
     , on_error_evt(this, EVT_PRINTHOST_ERROR, &PrintHostQueueDialog::on_error, this)
     , on_cancel_evt(this, EVT_PRINTHOST_CANCEL, &PrintHostQueueDialog::on_cancel, this)
diff --git a/src/slic3r/GUI/PrintHostDialogs.hpp b/src/slic3r/GUI/PrintHostDialogs.hpp
index 105899cf0..e6c46aae6 100644
--- a/src/slic3r/GUI/PrintHostDialogs.hpp
+++ b/src/slic3r/GUI/PrintHostDialogs.hpp
@@ -41,7 +41,7 @@ private:
 };
 
 
-class PrintHostQueueDialog : public wxDialog
+class PrintHostQueueDialog : public DPIDialog
 {
 public:
     class Event : public wxEvent
@@ -62,6 +62,10 @@ public:
     PrintHostQueueDialog(wxWindow *parent);
 
     void append_job(const PrintHostJob &job);
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override { Refresh(); }
+
 private:
     enum Column {
         COL_ID,
diff --git a/src/slic3r/GUI/SysInfoDialog.cpp b/src/slic3r/GUI/SysInfoDialog.cpp
index 2746c643e..31f75a926 100644
--- a/src/slic3r/GUI/SysInfoDialog.cpp
+++ b/src/slic3r/GUI/SysInfoDialog.cpp
@@ -41,10 +41,12 @@ std::string get_main_info(bool format_as_html)
 }
 
 SysInfoDialog::SysInfoDialog()
-    : wxDialog(NULL, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _(L("System Information")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
+    : DPIDialog(NULL, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _(L("System Information")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
 {
 	wxColour bgr_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 	SetBackgroundColour(bgr_clr);
+    SetFont(wxGetApp().normal_font());
+
     wxBoxSizer* hsizer = new wxBoxSizer(wxHORIZONTAL);
     hsizer->SetMinSize(wxSize(50 * wxGetApp().em_unit(), -1));
 
@@ -52,8 +54,9 @@ SysInfoDialog::SysInfoDialog()
 	main_sizer->Add(hsizer, 1, wxEXPAND | wxALL, 10);
 
     // logo
-    auto *logo = new wxStaticBitmap(this, wxID_ANY, create_scaled_bitmap(this, "Slic3r_192px.png", 192));
-	hsizer->Add(logo, 0, wxALIGN_CENTER_VERTICAL);
+    m_logo_bmp = ScalableBitmap(this, "Slic3r_192px.png", 192);
+    m_logo = new wxStaticBitmap(this, wxID_ANY, m_logo_bmp.bmp());
+	hsizer->Add(m_logo, 0, wxALIGN_CENTER_VERTICAL);
     
     wxBoxSizer* vsizer = new wxBoxSizer(wxVERTICAL);
     hsizer->Add(vsizer, 1, wxEXPAND|wxLEFT, 20);
@@ -61,8 +64,7 @@ SysInfoDialog::SysInfoDialog()
     // title
     {
         wxStaticText* title = new wxStaticText(this, wxID_ANY, SLIC3R_APP_NAME, wxDefaultPosition, wxDefaultSize);
-        wxFont title_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
-        title_font.SetWeight(wxFONTWEIGHT_BOLD);
+        wxFont title_font = wxGetApp().bold_font();
         title_font.SetFamily(wxFONTFAMILY_ROMAN);
         title_font.SetPointSize(22);
         title->SetFont(title_font);
@@ -70,7 +72,7 @@ SysInfoDialog::SysInfoDialog()
     }
 
     // main_info_text
-    wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+    wxFont font = wxGetApp().normal_font();
     const auto text_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
     auto text_clr_str = wxString::Format(wxT("#%02X%02X%02X"), text_clr.Red(), text_clr.Green(), text_clr.Blue());
     auto bgr_clr_str = wxString::Format(wxT("#%02X%02X%02X"), bgr_clr.Red(), bgr_clr.Green(), bgr_clr.Blue());
@@ -78,10 +80,10 @@ SysInfoDialog::SysInfoDialog()
     const int fs = font.GetPointSize() - 1;
     int size[] = { static_cast<int>(fs*1.5), static_cast<int>(fs*1.4), static_cast<int>(fs*1.3), fs, fs, fs, fs };
 
-    wxHtmlWindow* html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_NEVER);
+    m_html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_NEVER);
     {
-        html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
-        html->SetBorders(2);
+        m_html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
+        m_html->SetBorders(2);
 		const auto text = wxString::Format(
             "<html>"
             "<body bgcolor= %s link= %s>"
@@ -91,16 +93,16 @@ SysInfoDialog::SysInfoDialog()
             "</body>"
             "</html>", bgr_clr_str, text_clr_str, text_clr_str,
             get_main_info(true));
-        html->SetPage(text);
-        vsizer->Add(html, 1, wxEXPAND | wxBOTTOM, wxGetApp().em_unit());
+        m_html->SetPage(text);
+        vsizer->Add(m_html, 1, wxEXPAND | wxBOTTOM, wxGetApp().em_unit());
     }
 
     // opengl_info
-    wxHtmlWindow* opengl_info_html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO);
+    m_opengl_info_html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO);
     {
-        opengl_info_html->SetMinSize(wxSize(-1, 16 * wxGetApp().em_unit()));
-        opengl_info_html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
-        opengl_info_html->SetBorders(10);
+        m_opengl_info_html->SetMinSize(wxSize(-1, 16 * wxGetApp().em_unit()));
+        m_opengl_info_html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
+        m_opengl_info_html->SetBorders(10);
         const auto text = wxString::Format(
             "<html>"
             "<body bgcolor= %s link= %s>"
@@ -110,8 +112,8 @@ SysInfoDialog::SysInfoDialog()
             "</body>"
             "</html>", bgr_clr_str, text_clr_str, text_clr_str,
             _3DScene::get_gl_info(true, true));
-        opengl_info_html->SetPage(text);
-        main_sizer->Add(opengl_info_html, 1, wxEXPAND | wxBOTTOM, 15);
+        m_opengl_info_html->SetPage(text);
+        main_sizer->Add(m_opengl_info_html, 1, wxEXPAND | wxBOTTOM, 15);
     }
     
     wxStdDialogButtonSizer* buttons = this->CreateStdDialogButtonSizer(wxOK);
@@ -130,6 +132,32 @@ SysInfoDialog::SysInfoDialog()
 	main_sizer->SetSizeHints(this);
 }
 
+void SysInfoDialog::on_dpi_changed(const wxRect &suggested_rect)
+{
+    m_logo_bmp.msw_rescale();
+    m_logo->SetBitmap(m_logo_bmp.bmp());
+
+    wxFont font = GetFont();
+    const int fs = font.GetPointSize() - 1;
+    int font_size[] = { static_cast<int>(fs*1.5), static_cast<int>(fs*1.4), static_cast<int>(fs*1.3), fs, fs, fs, fs };
+
+    m_html->SetFonts(font.GetFaceName(), font.GetFaceName(), font_size);
+    m_html->Refresh();
+
+    const int& em = em_unit();
+
+    m_opengl_info_html->SetMinSize(wxSize(-1, 16 * em));
+    m_opengl_info_html->SetFonts(font.GetFaceName(), font.GetFaceName(), font_size);
+    m_opengl_info_html->Refresh();
+
+    const wxSize& size = wxSize(65 * em, 55 * em);
+
+    SetMinSize(size);
+    SetSize(size);
+
+    Refresh();
+}
+
 void SysInfoDialog::onCopyToClipboard(wxEvent &)
 {
     wxTheClipboard->Open();
diff --git a/src/slic3r/GUI/SysInfoDialog.hpp b/src/slic3r/GUI/SysInfoDialog.hpp
index ee1b85ce6..dec4b5635 100644
--- a/src/slic3r/GUI/SysInfoDialog.hpp
+++ b/src/slic3r/GUI/SysInfoDialog.hpp
@@ -4,14 +4,24 @@
 #include <wx/wx.h>
 #include <wx/html/htmlwin.h>
 
+#include "GUI_Utils.hpp"
+#include "wxExtensions.hpp"
+
 namespace Slic3r { 
 namespace GUI {
 
-class SysInfoDialog : public wxDialog
+class SysInfoDialog : public DPIDialog
 {
-    wxString text_info {wxEmptyString};
+    ScalableBitmap  m_logo_bmp;
+    wxStaticBitmap* m_logo;
+    wxHtmlWindow*   m_opengl_info_html;
+    wxHtmlWindow*   m_html;
+
 public:
     SysInfoDialog();
+
+protected:
+    void on_dpi_changed(const wxRect &suggested_rect) override;
     
 private:
     void onCopyToClipboard(wxEvent &);
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index a697c7a71..b57678e86 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -110,37 +110,28 @@ void Tab::create_preset_tab()
 #endif //__WXOSX__
 
 	// preset chooser
-    m_presets_choice = new wxBitmapComboBox(panel, wxID_ANY, "", wxDefaultPosition, wxSize(25 * m_em_unit, -1), 0, 0, wxCB_READONLY);
+    m_presets_choice = new wxBitmapComboBox(panel, wxID_ANY, "", wxDefaultPosition, wxSize(35 * m_em_unit, -1), 0, 0, wxCB_READONLY);
 
 	auto color = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
 
 	//buttons
-	wxBitmap bmpMenu;
-    bmpMenu = create_scaled_bitmap(this, "save");
-	m_btn_save_preset = new wxBitmapButton(panel, wxID_ANY, bmpMenu, wxDefaultPosition, wxDefaultSize, wxBORDER_NONE);
-	if (wxMSW) m_btn_save_preset->SetBackgroundColour(color);
-    bmpMenu = create_scaled_bitmap(this, "cross"/*"delete.png"*/);
-	m_btn_delete_preset = new wxBitmapButton(panel, wxID_ANY, bmpMenu, wxDefaultPosition, wxDefaultSize, wxBORDER_NONE);
-	if (wxMSW) m_btn_delete_preset->SetBackgroundColour(color);
+    m_scaled_buttons.reserve(6);
+    m_scaled_buttons.reserve(2);
+
+    add_scaled_button(panel, &m_btn_save_preset, "save");
+    add_scaled_button(panel, &m_btn_delete_preset, "cross");
 
 	m_show_incompatible_presets = false;
-	m_bmp_show_incompatible_presets = create_scaled_bitmap(this, "flag_red");
-	m_bmp_hide_incompatible_presets = create_scaled_bitmap(this, "flag_green");
-	m_btn_hide_incompatible_presets = new wxBitmapButton(panel, wxID_ANY, m_bmp_hide_incompatible_presets, wxDefaultPosition, wxDefaultSize, wxBORDER_NONE);
-	if (wxMSW) m_btn_hide_incompatible_presets->SetBackgroundColour(color);
+	add_scaled_bitmap(this, m_bmp_show_incompatible_presets, "flag_red");
+	add_scaled_bitmap(this, m_bmp_hide_incompatible_presets, "flag_green");
+
+    add_scaled_button(panel, &m_btn_hide_incompatible_presets, m_bmp_hide_incompatible_presets.name());
 
 	m_btn_save_preset->SetToolTip(_(L("Save current ")) + m_title);
 	m_btn_delete_preset->SetToolTip(_(L("Delete this preset")));
 	m_btn_delete_preset->Disable();
 
-	m_undo_btn = new wxButton(panel, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-	m_undo_to_sys_btn = new wxButton(panel, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-	m_question_btn = new wxButton(panel, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-	if (wxMSW) {
-		m_undo_btn->SetBackgroundColour(color);
-		m_undo_to_sys_btn->SetBackgroundColour(color);
-		m_question_btn->SetBackgroundColour(color);
-	}
+    add_scaled_button(panel, &m_question_btn, "question");
 
 	m_question_btn->SetToolTip(_(L("Hover the cursor over buttons to find more information \n"
 								   "or click this button.")));
@@ -148,22 +139,21 @@ void Tab::create_preset_tab()
 	// Determine the theme color of OS (dark or light)
     auto luma = wxGetApp().get_colour_approx_luma(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 	// Bitmaps to be shown on the "Revert to system" aka "Lock to system" button next to each input field.
-	m_bmp_value_lock  	   = create_scaled_bitmap(this, luma >= 128 ? "lock_closed" : "lock_closed_white");
-	m_bmp_value_unlock     = create_scaled_bitmap(this, "lock_open");
+	add_scaled_bitmap(this, m_bmp_value_lock  , luma >= 128 ? "lock_closed" : "lock_closed_white");
+	add_scaled_bitmap(this, m_bmp_value_unlock, "lock_open");
 	m_bmp_non_system = &m_bmp_white_bullet;
 	// Bitmaps to be shown on the "Undo user changes" button next to each input field.
-	m_bmp_value_revert    = create_scaled_bitmap(this, "undo");
-	m_bmp_white_bullet    = create_scaled_bitmap(this, luma >= 128 ? "dot" : "dot_white"/*"bullet_white.png"*/);
-	m_bmp_question        = create_scaled_bitmap(this, "question");
+	add_scaled_bitmap(this, m_bmp_value_revert, "undo");
+	add_scaled_bitmap(this, m_bmp_white_bullet, luma >= 128 ? "dot" : "dot_white");
 
 	fill_icon_descriptions();
 	set_tooltips_text();
 
-	m_undo_btn->SetBitmap(m_bmp_white_bullet);
+    add_scaled_button(panel, &m_undo_btn,        m_bmp_white_bullet.name());
+    add_scaled_button(panel, &m_undo_to_sys_btn, m_bmp_white_bullet.name());
+
 	m_undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent) { on_roll_back_value(); }));
-	m_undo_to_sys_btn->SetBitmap(m_bmp_white_bullet);
 	m_undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent) { on_roll_back_value(true); }));
-	m_question_btn->SetBitmap(m_bmp_question);
 	m_question_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent)
 	{
 		auto dlg = new ButtonsDescription(this, &m_icon_descriptions);
@@ -183,7 +173,7 @@ void Tab::create_preset_tab()
 	m_default_text_clr		= wxGetApp().get_label_clr_default();
 
     // Sizer with buttons for mode changing
-    m_mode_sizer = new PrusaModeSizer(panel);
+    m_mode_sizer = new ModeSizer(panel);
 
     const float scale_factor = wxGetApp().em_unit()*0.1;// GetContentScaleFactor();
 	m_hsizer = new wxBoxSizer(wxHORIZONTAL);
@@ -259,12 +249,36 @@ void Tab::create_preset_tab()
 		toggle_show_hide_incompatible();
 	}));
 
+    // Fill cache for mode bitmaps
+    m_mode_bitmap_cache.reserve(3);
+    m_mode_bitmap_cache.push_back(ScalableBitmap(this, "mode_simple_.png"));
+    m_mode_bitmap_cache.push_back(ScalableBitmap(this, "mode_middle_.png"));
+    m_mode_bitmap_cache.push_back(ScalableBitmap(this, "mode_expert_.png"));
+
 	// Initialize the DynamicPrintConfig by default keys/values.
 	build();
 	rebuild_page_tree();
     m_complited = true;
 }
 
+void Tab::add_scaled_button(wxWindow* parent, 
+                            ScalableButton** btn, 
+                            const std::string& icon_name, 
+                            const wxString& label/* = wxEmptyString*/, 
+                            long style /*= wxBU_EXACTFIT | wxNO_BORDER*/)
+{
+    *btn = new ScalableButton(parent, wxID_ANY, icon_name, label, wxDefaultSize, wxDefaultPosition, style);
+    m_scaled_buttons.push_back(*btn);
+}
+
+void Tab::add_scaled_bitmap(wxWindow* parent, 
+                            ScalableBitmap& bmp, 
+                            const std::string& icon_name)
+{
+    bmp = ScalableBitmap(parent, icon_name);
+    m_scaled_bitmaps.push_back(&bmp);
+}
+
 void Tab::load_initial_data()
 {
 	m_config = &m_presets->get_edited_preset().config;
@@ -281,9 +295,8 @@ Slic3r::GUI::PageShp Tab::add_options_page(const wxString& title, const std::str
 		icon_idx = (m_icon_index.find(icon) == m_icon_index.end()) ? -1 : m_icon_index.at(icon);
 		if (icon_idx == -1) {
 			// Add a new icon to the icon list.
-//             wxIcon img_icon(from_u8(Slic3r::var(icon)), wxBITMAP_TYPE_PNG);
-//             m_icons->Add(img_icon);
-            m_icons->Add(create_scaled_bitmap(this, icon));
+            m_scaled_icons_list.push_back(ScalableBitmap(this, icon));
+            m_icons->Add(m_scaled_icons_list.back().bmp());
             icon_idx = ++m_icon_count;
 			m_icon_index[icon] = icon_idx;
 		}
@@ -294,7 +307,7 @@ Slic3r::GUI::PageShp Tab::add_options_page(const wxString& title, const std::str
 #else
 	auto panel = this;
 #endif
-	PageShp page(new Page(panel, title, icon_idx));
+	PageShp page(new Page(panel, title, icon_idx, m_mode_bitmap_cache));
 //	page->SetBackgroundStyle(wxBG_STYLE_SYSTEM);
 #ifdef __WINDOWS__
 //	page->SetDoubleBuffered(true);
@@ -402,8 +415,8 @@ void Tab::update_changed_ui()
 	{
 		bool is_nonsys_value = false;
 		bool is_modified_value = true;
-		const wxBitmap *sys_icon =	&m_bmp_value_lock;
-		const wxBitmap *icon =		&m_bmp_value_revert;
+		const ScalableBitmap *sys_icon =	&m_bmp_value_lock;
+		const ScalableBitmap *icon =		&m_bmp_value_revert;
 
 		const wxColour *color =		&m_sys_label_clr;
 
@@ -595,8 +608,8 @@ void Tab::update_changed_tree_ui()
 
 void Tab::update_undo_buttons()
 {
-	m_undo_btn->SetBitmap(m_is_modified_values ? m_bmp_value_revert : m_bmp_white_bullet);
-	m_undo_to_sys_btn->SetBitmap(m_is_nonsys_values ? *m_bmp_non_system : m_bmp_value_lock);
+	m_undo_btn->        SetBitmap_(m_is_modified_values ? m_bmp_value_revert: m_bmp_white_bullet);
+	m_undo_to_sys_btn-> SetBitmap_(m_is_nonsys_values   ? *m_bmp_non_system : m_bmp_value_lock);
 
 	m_undo_btn->SetToolTip(m_is_modified_values ? m_ttg_value_revert : m_ttg_white_bullet);
 	m_undo_to_sys_btn->SetToolTip(m_is_nonsys_values ? *m_ttg_non_system : m_ttg_value_lock);
@@ -673,7 +686,7 @@ void Tab::update_dirty()
 
 void Tab::update_tab_ui()
 {
-	m_selected_preset_item = m_presets->update_tab_ui(m_presets_choice, m_show_incompatible_presets);
+	m_selected_preset_item = m_presets->update_tab_ui(m_presets_choice, m_show_incompatible_presets, m_em_unit);
 }
 
 // Load a provied DynamicConfig into the tab, modifying the active preset.
@@ -726,6 +739,42 @@ void Tab::update_visibility()
     update_changed_tree_ui();
 }
 
+void Tab::msw_rescale()
+{
+    m_em_unit = wxGetApp().em_unit();
+
+    m_mode_sizer->msw_rescale();
+
+    m_presets_choice->SetSize(35 * m_em_unit, -1);
+    m_treectrl->SetMinSize(wxSize(20 * m_em_unit, -1));
+
+    update_tab_ui();
+
+    // rescale buttons and cached bitmaps
+    for (const auto btn : m_scaled_buttons)
+        btn->msw_rescale();
+    for (const auto bmp : m_scaled_bitmaps)
+        bmp->msw_rescale();
+    for (ScalableBitmap& bmp : m_mode_bitmap_cache)
+        bmp.msw_rescale();
+
+    // rescale icons for tree_ctrl
+    for (ScalableBitmap& bmp : m_scaled_icons_list)
+        bmp.msw_rescale();
+    // recreate and set new ImageList for tree_ctrl
+    m_icons->RemoveAll();
+    m_icons = new wxImageList(m_scaled_icons_list.front().bmp().GetWidth(), m_scaled_icons_list.front().bmp().GetHeight());
+    for (ScalableBitmap& bmp : m_scaled_icons_list)
+        m_icons->Add(bmp.bmp());
+    m_treectrl->AssignImageList(m_icons);
+
+    // rescale options_groups
+    for (auto page : m_pages)
+        page->msw_rescale();
+
+    Layout();
+}
+
 Field* Tab::get_field(const t_config_option_key& opt_key, int opt_index/* = -1*/) const
 {
 	Field* field = nullptr;
@@ -1121,10 +1170,10 @@ void TabPrint::build()
 		optgroup->append_single_option_line("complete_objects");
 		line = { _(L("Extruder clearance (mm)")), "" };
 		Option option = optgroup->get_option("extruder_clearance_radius");
-		option.opt.width = 60;
+		option.opt.width = 6;
 		line.append_option(option);
 		option = optgroup->get_option("extruder_clearance_height");
-		option.opt.width = 60;
+		option.opt.width = 6;
 		line.append_option(option);
 		optgroup->append_line(line);
 
@@ -1138,14 +1187,14 @@ void TabPrint::build()
 		optgroup = page->new_optgroup(_(L("Post-processing scripts")), 0);	
 		option = optgroup->get_option("post_process");
 		option.opt.full_width = true;
-        option.opt.height = 5 * m_em_unit;//50;
+        option.opt.height = 5;//50;
 		optgroup->append_single_option_line(option);
 
 	page = add_options_page(_(L("Notes")), "note.png");
 		optgroup = page->new_optgroup(_(L("Notes")), 0);						
 		option = optgroup->get_option("notes");
 		option.opt.full_width = true;
-        option.opt.height = 25 * m_em_unit;//250;
+        option.opt.height = 25;//250;
 		optgroup->append_single_option_line(option);
 
 	page = add_options_page(_(L("Dependencies")), "wrench.png");
@@ -1458,7 +1507,7 @@ void TabFilament::build()
 		optgroup->append_single_option_line("bridge_fan_speed");
 		optgroup->append_single_option_line("disable_fan_first_layers");
 
-		optgroup = page->new_optgroup(_(L("Cooling thresholds")), 250);
+		optgroup = page->new_optgroup(_(L("Cooling thresholds")), 25);
 		optgroup->append_single_option_line("fan_below_layer_time");
 		optgroup->append_single_option_line("slowdown_below_layer_time");
 		optgroup->append_single_option_line("min_print_speed");
@@ -1508,8 +1557,8 @@ void TabFilament::build()
 		};
 		optgroup->append_line(line);
 
-        const int gcode_field_height = 15 * m_em_unit; // 150
-        const int notes_field_height = 25 * m_em_unit; // 250
+        const int gcode_field_height = 15; // 150
+        const int notes_field_height = 25; // 250
 
         page = add_options_page(_(L("Custom G-code")), "cog");
 		optgroup = page->new_optgroup(_(L("Start G-code")), 0);
@@ -1606,8 +1655,8 @@ wxSizer* Tab::description_line_widget(wxWindow* parent, ogStaticText* *StaticTex
 {
 	*StaticText = new ogStaticText(parent, "");
 
-	auto font = (new wxSystemSettings)->GetFont(wxSYS_DEFAULT_GUI_FONT);
-	(*StaticText)->SetFont(font);
+//	auto font = (new wxSystemSettings)->GetFont(wxSYS_DEFAULT_GUI_FONT);
+	(*StaticText)->SetFont(wxGetApp().normal_font());
 
 	auto sizer = new wxBoxSizer(wxHORIZONTAL);
 	sizer->Add(*StaticText, 1, wxEXPAND|wxALL, 0);
@@ -1629,10 +1678,10 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 	}
 
 	auto printhost_browse = [=](wxWindow* parent) {
-        auto btn = m_printhost_browse_btn = new wxButton(parent, wxID_ANY, _(L(" Browse ")) + dots, 
-            wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
+        add_scaled_button(parent, &m_printhost_browse_btn, "browse", _(L(" Browse ")) + dots, wxBU_LEFT | wxBU_EXACTFIT);
+        ScalableButton* btn = m_printhost_browse_btn;
 		btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
-        btn->SetBitmap(create_scaled_bitmap(this, "browse"));
+
 		auto sizer = new wxBoxSizer(wxHORIZONTAL);
 		sizer->Add(btn);
 
@@ -1648,10 +1697,9 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 	};
 
 	auto print_host_test = [this](wxWindow* parent) {
-		auto btn = m_print_host_test_btn = new wxButton(parent, wxID_ANY, _(L("Test")), 
-			wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
-		btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
-        btn->SetBitmap(create_scaled_bitmap(this, "test"));
+        add_scaled_button(parent, &m_print_host_test_btn, "test", _(L("Test")), wxBU_LEFT | wxBU_EXACTFIT);
+        ScalableButton* btn = m_print_host_test_btn;
+        btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 		auto sizer = new wxBoxSizer(wxHORIZONTAL);
 		sizer->Add(btn);
 
@@ -1755,6 +1803,8 @@ void TabPrinter::build_fff()
 
 	auto   *nozzle_diameter = dynamic_cast<const ConfigOptionFloats*>(m_config->option("nozzle_diameter"));
 	m_initial_extruders_count = m_extruders_count = nozzle_diameter->values.size();
+    wxGetApp().sidebar().update_objects_list_extruder_column(m_initial_extruders_count);
+
 	const Preset* parent_preset = m_presets->get_selected_preset_parent();
 	m_sys_extruders_count = parent_preset == nullptr ? 0 :
 			static_cast<const ConfigOptionFloats*>(parent_preset->config.option("nozzle_diameter"))->values.size();
@@ -1764,9 +1814,9 @@ void TabPrinter::build_fff()
 
         Line line = optgroup->create_single_option_line("bed_shape");//{ _(L("Bed shape")), "" };
 		line.widget = [this](wxWindow* parent) {
-			auto btn = new wxButton(parent, wxID_ANY, _(L(" Set "))+dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
-            btn->SetFont(wxGetApp().small_font());
-            btn->SetBitmap(create_scaled_bitmap(this, "printer_white"));
+            ScalableButton* btn;
+            add_scaled_button(parent, &btn, "printer_white", _(L(" Set ")) + dots, wxBU_LEFT | wxBU_EXACTFIT);
+            btn->SetFont(wxGetApp().normal_font());
 
 			auto sizer = new wxBoxSizer(wxHORIZONTAL);
 			sizer->Add(btn);
@@ -1881,7 +1931,7 @@ void TabPrinter::build_fff()
 						m_use_silent_mode = val;
 					}
 				}
-				build_extruder_pages();
+				build_unregular_pages();
 				update_dirty();
 				on_value_change(opt_key, value);
 			});
@@ -1893,8 +1943,8 @@ void TabPrinter::build_fff()
 		optgroup->append_single_option_line("use_volumetric_e");
 		optgroup->append_single_option_line("variable_layer_height");
 
-    const int gcode_field_height = 15 * m_em_unit; // 150
-    const int notes_field_height = 25 * m_em_unit; // 250
+    const int gcode_field_height = 15; // 150
+    const int notes_field_height = 25; // 250
 	page = add_options_page(_(L("Custom G-code")), "cog");
 		optgroup = page->new_optgroup(_(L("Start G-code")), 0);
 		option = optgroup->get_option("start_gcode");
@@ -1948,7 +1998,7 @@ void TabPrinter::build_fff()
 		};
 		optgroup->append_line(line);
 
-	build_extruder_pages();
+	build_unregular_pages();
 
 #if 0
 	if (!m_no_controller)
@@ -1965,9 +2015,10 @@ void TabPrinter::build_sla()
 
     Line line = optgroup->create_single_option_line("bed_shape");//{ _(L("Bed shape")), "" };
     line.widget = [this](wxWindow* parent) {
-        auto btn = new wxButton(parent, wxID_ANY, _(L(" Set ")) + dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
-        btn->SetFont(wxGetApp().small_font());
-        btn->SetBitmap(create_scaled_bitmap(this, "printer_white"));
+        ScalableButton* btn;
+        add_scaled_button(parent, &btn, "printer_white", _(L(" Set ")) + dots, wxBU_LEFT | wxBU_EXACTFIT);
+        btn->SetFont(wxGetApp().normal_font());
+
 
         auto sizer = new wxBoxSizer(wxHORIZONTAL);
         sizer->Add(btn);
@@ -2023,7 +2074,7 @@ void TabPrinter::build_sla()
     optgroup = page->new_optgroup(_(L("Print Host upload")));
     build_printhost(optgroup.get());
 
-    const int notes_field_height = 25 * m_em_unit; // 250
+    const int notes_field_height = 25; // 250
 
     page = add_options_page(_(L("Notes")), "note.png");
     optgroup = page->new_optgroup(_(L("Notes")), 0);
@@ -2051,13 +2102,23 @@ void TabPrinter::update_serial_ports()
 
 void TabPrinter::extruders_count_changed(size_t extruders_count)
 {
-	m_extruders_count = extruders_count;
-	m_preset_bundle->printers.get_edited_preset().set_num_extruders(extruders_count);
-	m_preset_bundle->update_multi_material_filament_presets();
-	build_extruder_pages();
-	reload_config();
-	on_value_change("extruders_count", extruders_count);
-    wxGetApp().sidebar().update_objects_list_extruder_column(extruders_count);
+    bool is_count_changed = false;
+    if (m_extruders_count != extruders_count) {
+	    m_extruders_count = extruders_count;
+	    m_preset_bundle->printers.get_edited_preset().set_num_extruders(extruders_count);
+	    m_preset_bundle->update_multi_material_filament_presets();
+        is_count_changed = true;
+    }
+
+    /* This function should be call in any case because of correct updating/rebuilding 
+     * of unregular pages of a Printer Settings
+     */
+	build_unregular_pages();
+
+    if (is_count_changed) {
+        on_value_change("extruders_count", extruders_count);
+        wxGetApp().sidebar().update_objects_list_extruder_column(extruders_count);
+    }
 }
 
 void TabPrinter::append_option_line(ConfigOptionsGroupShp optgroup, const std::string opt_key)
@@ -2078,12 +2139,12 @@ PageShp TabPrinter::build_kinematics_page()
 		// Legend for OptionsGroups
 		auto optgroup = page->new_optgroup("");
 		optgroup->set_show_modified_btns_val(false);
-        optgroup->label_width = 23 * m_em_unit;// 230;
+        optgroup->label_width = 23;// 230;
 		auto line = Line{ "", "" };
 
 		ConfigOptionDef def;
 		def.type = coString;
-		def.width = 150;
+		def.width = 15;
 		def.gui_type = "legend";
         def.mode = comAdvanced;
 		def.tooltip = L("Values in this column are for Full Power mode");
@@ -2125,12 +2186,23 @@ PageShp TabPrinter::build_kinematics_page()
 	return page;
 }
 
-
-void TabPrinter::build_extruder_pages()
+/* Previous name build_extruder_pages().
+ * 
+ * This function was renamed because of now it implements not just an extruder pages building, 
+ * but "Machine limits" and "Single extruder MM setup" too 
+ * (These pages can changes according to the another values of a current preset)
+ * */
+void TabPrinter::build_unregular_pages()
 {
 	size_t		n_before_extruders = 2;			//	Count of pages before Extruder pages
 	bool		is_marlin_flavor = m_config->option<ConfigOptionEnum<GCodeFlavor>>("gcode_flavor")->value == gcfMarlin;
 
+    /* ! Freeze/Thaw in this function is needed to avoid call OnPaint() for erased pages 
+     * and be cause of application crash, when try to change Preset in moment,
+     * when one of unregular pages is selected.
+     *  */
+    Freeze();
+
 	// Add/delete Kinematics page according to is_marlin_flavor
 	size_t existed_page = 0;
 	for (int i = n_before_extruders; i < m_pages.size(); ++i) // first make sure it's not there already
@@ -2175,12 +2247,11 @@ void TabPrinter::build_extruder_pages()
 		m_has_single_extruder_MM_page = true;
 	}
 	
-
+    // Build missed extruder pages
 	for (auto extruder_idx = m_extruders_count_old; extruder_idx < m_extruders_count; ++extruder_idx) {
 		//# build page
-		char buf[512];
-		sprintf(buf, _CHB(L("Extruder %d")), extruder_idx + 1);
-		auto page = add_options_page(from_u8(buf), "funnel", true);
+        const wxString& page_name = wxString::Format(_(L("Extruder %d")), int(extruder_idx + 1));
+        auto page = add_options_page(page_name, "funnel", true);
 		m_pages.insert(m_pages.begin() + n_before_extruders + extruder_idx, page);
 			
 			auto optgroup = page->new_optgroup(_(L("Size")));
@@ -2223,8 +2294,13 @@ void TabPrinter::build_extruder_pages()
 		m_pages.erase(	m_pages.begin() + n_before_extruders + m_extruders_count, 
 						m_pages.begin() + n_before_extruders + m_extruders_count_old);
 
+    Thaw();
+
 	m_extruders_count_old = m_extruders_count;
 	rebuild_page_tree();
+
+    // Reload preset pages with current configuration values
+    reload_config();
 }
 
 // this gets executed after preset is loaded and before GUI fields are updated
@@ -2492,7 +2568,6 @@ void Tab::rebuild_page_tree()
 			m_treectrl->SelectItem(item);
 		}
 	}
-// 	Thaw();
 }
 
 void Tab::update_page_tree_visibility()
@@ -2728,7 +2803,8 @@ bool Tab::may_switch_to_SLA_preset()
 
 void Tab::OnTreeSelChange(wxTreeEvent& event)
 {
-	if (m_disable_tree_sel_changed_event) return;
+	if (m_disable_tree_sel_changed_event)         
+        return;
 
 // There is a bug related to Ubuntu overlay scrollbars, see https://github.com/prusa3d/Slic3r/issues/898 and https://github.com/prusa3d/Slic3r/issues/952.
 // The issue apparently manifests when Show()ing a window with overlay scrollbars while the UI is frozen. For this reason,
@@ -2877,7 +2953,7 @@ void Tab::toggle_show_hide_incompatible()
 
 void Tab::update_show_hide_incompatible_button()
 {
-	m_btn_hide_incompatible_presets->SetBitmap(m_show_incompatible_presets ?
+	m_btn_hide_incompatible_presets->SetBitmap_(m_show_incompatible_presets ?
 		m_bmp_show_incompatible_presets : m_bmp_hide_incompatible_presets);
 	m_btn_hide_incompatible_presets->SetToolTip(m_show_incompatible_presets ?
 		"Both compatible an incompatible presets are shown. Click to hide presets not compatible with the current printer." :
@@ -2909,10 +2985,8 @@ wxSizer* Tab::compatible_widget_create(wxWindow* parent, PresetDependencies &dep
 {
 	deps.checkbox = new wxCheckBox(parent, wxID_ANY, _(L("All")));
 	deps.checkbox->SetFont(Slic3r::GUI::wxGetApp().normal_font());
-	deps.btn = new wxButton(parent, wxID_ANY, _(L(" Set "))+dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT | wxBU_EXACTFIT);
-	deps.btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
-
-    deps.btn->SetBitmap(create_scaled_bitmap(this, "printer_white"));
+    add_scaled_button(parent, &deps.btn, "printer_white", _(L(" Set ")) + dots, wxBU_LEFT | wxBU_EXACTFIT);
+    deps.btn->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 
 	auto sizer = new wxBoxSizer(wxHORIZONTAL);
 	sizer->Add((deps.checkbox), 0, wxALIGN_CENTER_VERTICAL);
@@ -3069,6 +3143,12 @@ void Page::update_visibility(ConfigOptionMode mode)
     m_show = ret_val;
 }
 
+void Page::msw_rescale()
+{
+    for (auto group : m_optgroups)
+        group->msw_rescale();
+}
+
 Field* Page::get_field(const t_config_option_key& opt_key, int opt_index /*= -1*/) const
 {
 	Field* field = nullptr;
@@ -3092,18 +3172,16 @@ bool Page::set_value(const t_config_option_key& opt_key, const boost::any& value
 // package Slic3r::GUI::Tab::Page;
 ConfigOptionsGroupShp Page::new_optgroup(const wxString& title, int noncommon_label_width /*= -1*/)
 {
-    auto extra_column = [](wxWindow* parent, const Line& line)
+    auto extra_column = [this](wxWindow* parent, const Line& line)
     {
         std::string bmp_name;
         const std::vector<Option>& options = line.get_options();
-        if (options.size() == 0 || options[0].opt.gui_type == "legend")
-            bmp_name = "";// "error.png";
-        else {
-            auto mode = options[0].opt.mode;  //we assume that we have one option per line
-            bmp_name = mode == comExpert   ? "mode_expert_.png" :
-                       mode == comAdvanced ? "mode_middle_.png" : "mode_simple_.png";
-        }                               
-        auto bmp = new wxStaticBitmap(parent, wxID_ANY, bmp_name.empty() ? wxNullBitmap : create_scaled_bitmap(parent, bmp_name));
+        int mode_id = int(options[0].opt.mode);
+        const wxBitmap& bitmap = options.size() == 0 || options[0].opt.gui_type == "legend" ? wxNullBitmap :
+                                 m_mode_bitmap_cache[mode_id].bmp();
+        auto bmp = new wxStaticBitmap(parent, wxID_ANY, bitmap);
+        bmp->SetClientData((void*)&m_mode_bitmap_cache[mode_id]);
+
         bmp->SetBackgroundStyle(wxBG_STYLE_PAINT);
         return bmp;
     };
@@ -3142,6 +3220,14 @@ ConfigOptionsGroupShp Page::new_optgroup(const wxString& title, int noncommon_la
 		return static_cast<Tab*>(tab)->m_presets->get_selected_preset_parent() != nullptr;
 	};
 
+    optgroup->rescale_extra_column_item = [this](wxWindow* win) {
+        auto *ctrl = dynamic_cast<wxStaticBitmap*>(win);
+        if (ctrl == nullptr)
+            return;
+
+        ctrl->SetBitmap(reinterpret_cast<ScalableBitmap*>(ctrl->GetClientData())->bmp());
+    };
+
 	vsizer()->Add(optgroup->sizer, 0, wxEXPAND | wxALL, 10);
 	m_optgroups.push_back(optgroup);
 
@@ -3222,7 +3308,7 @@ void TabSLAMaterial::build()
     optgroup->append_single_option_line("initial_exposure_time");
 
     optgroup = page->new_optgroup(_(L("Corrections")));
-    optgroup->label_width = 19 * m_em_unit;//190;
+    optgroup->label_width = 19;//190;
     std::vector<std::string> corrections = {"material_correction"};
 //    std::vector<std::string> axes{ "X", "Y", "Z" };
     std::vector<std::string> axes{ "XY", "Z" };
@@ -3232,7 +3318,7 @@ void TabSLAMaterial::build()
         for (auto& axis : axes) {
             auto opt = optgroup->get_option(opt_key, id);
             opt.opt.label = axis;
-            opt.opt.width = 60;
+            opt.opt.width = 6;
             line.append_option(opt);
             ++id;
         }
@@ -3244,7 +3330,7 @@ void TabSLAMaterial::build()
     optgroup->label_width = 0;
     Option option = optgroup->get_option("material_notes");
     option.opt.full_width = true;
-    option.opt.height = 25 * m_em_unit;//250;
+    option.opt.height = 25;//250;
     optgroup->append_single_option_line(option);
 
     page = add_options_page(_(L("Dependencies")), "wrench.png");
diff --git a/src/slic3r/GUI/Tab.hpp b/src/slic3r/GUI/Tab.hpp
index 58950990c..ae13cb4b5 100644
--- a/src/slic3r/GUI/Tab.hpp
+++ b/src/slic3r/GUI/Tab.hpp
@@ -30,14 +30,14 @@
 
 #include "BedShapeDialog.hpp"
 #include "Event.hpp"
-
-class PrusaModeSizer;
+#include "wxExtensions.hpp"
 
 namespace Slic3r {
 namespace GUI {
 
-typedef std::pair<wxBitmap*, std::string>				t_icon_description;
-typedef std::vector<std::pair<wxBitmap*, std::string>>	t_icon_descriptions;
+
+typedef std::pair<ScalableBitmap*, std::string>				    t_icon_description;
+typedef std::vector<std::pair<ScalableBitmap*, std::string>>    t_icon_descriptions;
 
 // Single Tab page containing a{ vsizer } of{ optgroups }
 // package Slic3r::GUI::Tab::Page;
@@ -50,10 +50,11 @@ class Page : public wxScrolledWindow
 	wxBoxSizer*		m_vsizer;
     bool            m_show = true;
 public:
-	Page(wxWindow* parent, const wxString title, const int iconID) :
+    Page(wxWindow* parent, const wxString title, const int iconID, const std::vector<ScalableBitmap>& mode_bmp_cache) :
 			m_parent(parent),
 			m_title(title),
-			m_iconID(iconID)
+			m_iconID(iconID),
+            m_mode_bitmap_cache(mode_bmp_cache)
 	{
 		Create(m_parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL);
 		m_vsizer = new wxBoxSizer(wxVERTICAL);
@@ -67,6 +68,7 @@ public:
 
     // Delayed layout after resizing the main window.
     bool 				layout_valid = false;
+    const std::vector<ScalableBitmap>&   m_mode_bitmap_cache;
 
 public:
 	std::vector <ConfigOptionsGroupShp> m_optgroups;
@@ -79,6 +81,7 @@ public:
 	void		set_config(DynamicPrintConfig* config_in) { m_config = config_in; }
 	void		reload_config();
     void        update_visibility(ConfigOptionMode mode);
+    void        msw_rescale();
 	Field*		get_field(const t_config_option_key& opt_key, int opt_index = -1) const;
 	bool		set_value(const t_config_option_key& opt_key, const boost::any& value);
 	ConfigOptionsGroupShp	new_optgroup(const wxString& title, int noncommon_label_width = -1);
@@ -119,20 +122,20 @@ protected:
 	std::string			m_name;
 	const wxString		m_title;
 	wxBitmapComboBox*	m_presets_choice;
-	wxBitmapButton*		m_btn_save_preset;
-	wxBitmapButton*		m_btn_delete_preset;
-	wxBitmapButton*		m_btn_hide_incompatible_presets;
+	ScalableButton*		m_btn_save_preset;
+	ScalableButton*		m_btn_delete_preset;
+	ScalableButton*		m_btn_hide_incompatible_presets;
 	wxBoxSizer*			m_hsizer;
 	wxBoxSizer*			m_left_sizer;
 	wxTreeCtrl*			m_treectrl;
 	wxImageList*		m_icons;
 
-    PrusaModeSizer*     m_mode_sizer;
+    ModeSizer*     m_mode_sizer;
 
    	struct PresetDependencies {
 		Preset::Type type	  = Preset::TYPE_INVALID;
 		wxCheckBox 	*checkbox = nullptr;
-		wxButton 	*btn   	  = nullptr;
+		ScalableButton 	*btn  = nullptr;
 		std::string  key_list; // "compatible_printers"
 		std::string  key_condition;
 		std::string  dialog_title;
@@ -141,25 +144,27 @@ protected:
 	PresetDependencies 	m_compatible_printers;
 	PresetDependencies 	m_compatible_prints;
 
-	wxButton*			m_undo_btn;
-	wxButton*			m_undo_to_sys_btn;
-	wxButton*			m_question_btn;
-	wxImageList*		m_preset_icons;
+	ScalableButton*			m_undo_btn;
+	ScalableButton*			m_undo_to_sys_btn;
+	ScalableButton*			m_question_btn;
 
 	// Cached bitmaps.
 	// A "flag" icon to be displayned next to the preset name in the Tab's combo box.
-	wxBitmap			m_bmp_show_incompatible_presets;
-	wxBitmap			m_bmp_hide_incompatible_presets;
+	ScalableBitmap			m_bmp_show_incompatible_presets;
+	ScalableBitmap			m_bmp_hide_incompatible_presets;
 	// Bitmaps to be shown on the "Revert to system" aka "Lock to system" button next to each input field.
-	wxBitmap 			m_bmp_value_lock;
-	wxBitmap 			m_bmp_value_unlock;
-	wxBitmap 			m_bmp_white_bullet;
+	ScalableBitmap 			m_bmp_value_lock;
+	ScalableBitmap 			m_bmp_value_unlock;
+	ScalableBitmap 			m_bmp_white_bullet;
 	// The following bitmap points to either m_bmp_value_unlock or m_bmp_white_bullet, depending on whether the current preset has a parent preset.
-	wxBitmap 		   *m_bmp_non_system;
+	ScalableBitmap 		   *m_bmp_non_system;
 	// Bitmaps to be shown on the "Undo user changes" button next to each input field.
-	wxBitmap 			m_bmp_value_revert;
-// 	wxBitmap 			m_bmp_value_unmodified;
-	wxBitmap			m_bmp_question;
+	ScalableBitmap 			m_bmp_value_revert;
+    
+    std::vector<ScalableButton*>	m_scaled_buttons = {};    
+    std::vector<ScalableBitmap*>	m_scaled_bitmaps = {};    
+    std::vector<ScalableBitmap>     m_scaled_icons_list = {};
+    std::vector<ScalableBitmap>     m_mode_bitmap_cache = {};
 
 	// Colors for ui "decoration"
 	wxColour			m_sys_label_clr;
@@ -236,7 +241,11 @@ public:
     virtual bool supports_printer_technology(const PrinterTechnology tech) = 0;
 
 	void		create_preset_tab();
-	void		load_current_preset();
+    void        add_scaled_button(wxWindow* parent, ScalableButton** btn, const std::string& icon_name, 
+                                  const wxString& label = wxEmptyString, 
+                                  long style = wxBU_EXACTFIT | wxNO_BORDER);
+    void        add_scaled_bitmap(wxWindow* parent, ScalableBitmap& btn, const std::string& icon_name);
+    void		load_current_preset();
 	void        rebuild_page_tree();
 	void        update_page_tree_visibility();
 	// Select a new preset, possibly delete the current one.
@@ -274,6 +283,7 @@ public:
 	virtual void	reload_config();
     void            update_mode();
     void            update_visibility();
+    void            msw_rescale();
 	Field*			get_field(const t_config_option_key& opt_key, int opt_index = -1) const;
 	bool			set_value(const t_config_option_key& opt_key, const boost::any& value);
 	wxSizer*		description_line_widget(wxWindow* parent, ogStaticText** StaticText);
@@ -345,8 +355,8 @@ class TabPrinter : public Tab
     void build_printhost(ConfigOptionsGroup *optgroup);
 public:
 	wxButton*	m_serial_test_btn = nullptr;
-	wxButton*	m_print_host_test_btn = nullptr;
-	wxButton*	m_printhost_browse_btn = nullptr;
+	ScalableButton*	m_print_host_test_btn = nullptr;
+	ScalableButton*	m_printhost_browse_btn = nullptr;
 
 	size_t		m_extruders_count;
 	size_t		m_extruders_count_old = 0;
@@ -368,7 +378,7 @@ public:
 	void		update_serial_ports();
 	void		extruders_count_changed(size_t extruders_count);
 	PageShp		build_kinematics_page();
-	void		build_extruder_pages();
+	void		build_unregular_pages();
 	void		on_preset_loaded() override;
 	void		init_options_list() override;
     bool 		supports_printer_technology(const PrinterTechnology /* tech */) override { return true; }
diff --git a/src/slic3r/GUI/wxExtensions.cpp b/src/slic3r/GUI/wxExtensions.cpp
index c0390d1a2..277494034 100644
--- a/src/slic3r/GUI/wxExtensions.cpp
+++ b/src/slic3r/GUI/wxExtensions.cpp
@@ -18,6 +18,7 @@
 #include "GUI_ObjectList.hpp"
 #include "libslic3r/GCode/PreviewData.hpp"
 #include "I18N.hpp"
+#include "GUI_Utils.hpp"
 
 using Slic3r::GUI::from_u8;
 
@@ -266,161 +267,23 @@ void wxDataViewTreeCtrlComboPopup::OnDataViewTreeCtrlSelection(wxCommandEvent& e
 	cmb->SetText(selected);
 }
 
-// ----------------------------------------------------------------------------
-// ***  PrusaCollapsiblePane  ***    
-// ----------------------------------------------------------------------------
-void PrusaCollapsiblePane::OnStateChange(const wxSize& sz)
+/* Function for getting of em_unit value from correct parent.
+ * In most of cases it is m_em_unit value from GUI_App,
+ * but for DPIDialogs it's its own value. 
+ * This value will be used to correct rescale after moving between 
+ * Displays with different HDPI */
+int em_unit(wxWindow* win)
 {
-#ifdef __WXOSX__
-	wxCollapsiblePane::OnStateChange(sz);
-#else
-	SetSize(sz);
-
-	if (this->HasFlag(wxCP_NO_TLW_RESIZE))
-	{
-		// the user asked to explicitly handle the resizing itself...
-		return;
-	}
-
-	auto top = GetParent(); //right_panel
-	if (!top)
-		return;
-
-	wxSizer *sizer = top->GetSizer();
-	if (!sizer)
-		return;
-
-	const wxSize newBestSize = sizer->ComputeFittingClientSize(top);
-	top->SetMinClientSize(newBestSize);
-
-	wxWindowUpdateLocker noUpdates_p(top->GetParent());
-	// we shouldn't attempt to resize a maximized window, whatever happens
-	// 	if (!top->IsMaximized())
-	// 		top->SetClientSize(newBestSize);
-	top->GetParent()->Layout();
-	top->Refresh();
-#endif //__WXOSX__
+    if (win)
+    {
+        Slic3r::GUI::DPIDialog* dlg = dynamic_cast<Slic3r::GUI::DPIDialog*>(Slic3r::GUI::find_toplevel_parent(win));
+        if (dlg)
+            return dlg->em_unit();
+    }
+    
+    return Slic3r::GUI::wxGetApp().em_unit();
 }
 
-// ----------------------------------------------------------------------------
-// ***  PrusaCollapsiblePaneMSW  ***    used only #ifdef __WXMSW__
-// ----------------------------------------------------------------------------
-#ifdef __WXMSW__
-bool PrusaCollapsiblePaneMSW::Create(wxWindow *parent, wxWindowID id, const wxString& label, 
-	const wxPoint& pos, const wxSize& size, long style, const wxValidator& val, const wxString& name)
-{
-	if (!wxControl::Create(parent, id, pos, size, style, val, name))
-		return false;
-	// m_pStaticLine = NULL;
-	m_strLabel = label;
-
-	// sizer containing the expand button and possibly a static line
-	m_sz = new wxBoxSizer(wxHORIZONTAL);
-
-	m_bmp_close.LoadFile(Slic3r::GUI::from_u8(Slic3r::var("disclosure_triangle_close.png")), wxBITMAP_TYPE_PNG);
-	m_bmp_open.LoadFile(Slic3r::GUI::from_u8(Slic3r::var("disclosure_triangle_open.png")), wxBITMAP_TYPE_PNG);
-
-	m_pDisclosureTriangleButton = new wxButton(this, wxID_ANY, m_strLabel, wxPoint(0, 0),
-		wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
-	UpdateBtnBmp();
-	m_pDisclosureTriangleButton->Bind(wxEVT_BUTTON, [this](wxCommandEvent& event)
-	{
-		if (event.GetEventObject() != m_pDisclosureTriangleButton)
-		{
-			event.Skip();
-			return;
-		}
-
-		Collapse(!IsCollapsed());
-
-		// this change was generated by the user - send the event
-		wxCollapsiblePaneEvent ev(this, GetId(), IsCollapsed());
-		GetEventHandler()->ProcessEvent(ev);
-	});
-
-	m_sz->Add(m_pDisclosureTriangleButton, 0, wxLEFT | wxTOP | wxBOTTOM, GetBorder());
-
-	// do not set sz as our sizers since we handle the pane window without using sizers
-	m_pPane = new wxPanel(this, wxID_ANY, wxDefaultPosition, wxDefaultSize,
-		wxTAB_TRAVERSAL | wxNO_BORDER, wxT("wxCollapsiblePanePane"));
-
-    wxColour&& clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
-	m_pDisclosureTriangleButton->SetBackgroundColour(clr);
-	this->SetBackgroundColour(clr);
-	m_pPane->SetBackgroundColour(clr);
-
-	// start as collapsed:
-	m_pPane->Hide();
-
-	return true;
-}
-
-void PrusaCollapsiblePaneMSW::UpdateBtnBmp()
-{
-	if (IsCollapsed())
-		m_pDisclosureTriangleButton->SetBitmap(m_bmp_close);
-	else{
-		m_pDisclosureTriangleButton->SetBitmap(m_bmp_open);
-		// To updating button bitmap it's needed to lost focus on this button, so
-		// we set focus to mainframe 
-		//GetParent()->GetParent()->GetParent()->SetFocus();
-		//or to pane
-		GetPane()->SetFocus();
-	}
-	Layout();
-}
-
-void PrusaCollapsiblePaneMSW::SetLabel(const wxString &label)
-{
-	m_strLabel = label;
-	m_pDisclosureTriangleButton->SetLabel(m_strLabel);
-	Layout();
-}
-
-bool PrusaCollapsiblePaneMSW::Layout()
-{
-	if (!m_pDisclosureTriangleButton || !m_pPane || !m_sz)
-		return false;     // we need to complete the creation first!
-
-	wxSize oursz(GetSize());
-
-	// move & resize the button and the static line
-	m_sz->SetDimension(0, 0, oursz.GetWidth(), m_sz->GetMinSize().GetHeight());
-	m_sz->Layout();
-
-	if (IsExpanded())
-	{
-		// move & resize the container window
-		int yoffset = m_sz->GetSize().GetHeight() + GetBorder();
-		m_pPane->SetSize(0, yoffset,
-			oursz.x, oursz.y - yoffset);
-
-		// this is very important to make the pane window layout show correctly
-		m_pPane->Layout();
-	}
-
-	return true;
-}
-
-void PrusaCollapsiblePaneMSW::Collapse(bool collapse)
-{
-	// optimization
-	if (IsCollapsed() == collapse)
-		return;
-
-	InvalidateBestSize();
-
-	// update our state
-	m_pPane->Show(!collapse);
-
-	// update button bitmap
-	UpdateBtnBmp();
-
-	OnStateChange(GetBestSize());
-}
-#endif //__WXMSW__
-
-
 // If an icon has horizontal orientation (width > height) call this function with is_horizontal = true
 wxBitmap create_scaled_bitmap(wxWindow *win, const std::string& bmp_name_in, const int px_cnt/* = 16*/, const bool is_horizontal /* = false*/)
 {
@@ -436,7 +299,7 @@ wxBitmap create_scaled_bitmap(wxWindow *win, const std::string& bmp_name_in, con
     unsigned int height, width = height = 0;
     unsigned int& scale_base = is_horizontal ? width : height;
 
-    scale_base = (unsigned int)(Slic3r::GUI::wxGetApp().em_unit() * px_cnt * 0.1f + 0.5f);
+    scale_base = (unsigned int)(em_unit(win) * px_cnt * 0.1f + 0.5f);
 
     std::string bmp_name = bmp_name_in;
     boost::replace_last(bmp_name, ".png", "");
@@ -457,58 +320,76 @@ wxBitmap create_scaled_bitmap(wxWindow *win, const std::string& bmp_name_in, con
 
 // *****************************************************************************
 // ----------------------------------------------------------------------------
-// PrusaObjectDataViewModelNode
+// ObjectDataViewModelNode
 // ----------------------------------------------------------------------------
 
-void PrusaObjectDataViewModelNode::set_object_action_icon() {
-    m_action_icon = create_scaled_bitmap(nullptr, "advanced_plus");    // FIXME: pass window ptr
-}
-void  PrusaObjectDataViewModelNode::set_part_action_icon() {
-    m_action_icon = create_scaled_bitmap(nullptr, m_type == itVolume ? "cog" : "set_separate_obj");    // FIXME: pass window ptr
+void ObjectDataViewModelNode::set_action_icon()
+{
+    m_action_icon_name = m_type == itObject ? "advanced_plus" : 
+                         m_type == itVolume ? "cog"           : "set_separate_obj";
+    m_action_icon = create_scaled_bitmap(nullptr, m_action_icon_name);    // FIXME: pass window ptr
 }
 
 Slic3r::GUI::BitmapCache *m_bitmap_cache = nullptr;
-bool PrusaObjectDataViewModelNode::update_settings_digest(const std::vector<std::string>& categories)
+void ObjectDataViewModelNode::update_settings_digest_bitmaps()
+{
+    m_bmp = m_empty_bmp;
+
+    std::map<std::string, wxBitmap>& categories_icon = Slic3r::GUI::wxGetApp().obj_list()->CATEGORY_ICON;
+
+    std::string scaled_bitmap_name = m_name.ToUTF8().data();
+    scaled_bitmap_name += "-em" + std::to_string(Slic3r::GUI::wxGetApp().em_unit());
+
+    wxBitmap *bmp = m_bitmap_cache->find(scaled_bitmap_name);
+    if (bmp == nullptr) {
+        std::vector<wxBitmap> bmps;
+        for (auto& cat : m_opt_categories)
+            bmps.emplace_back(  categories_icon.find(cat) == categories_icon.end() ?
+                                wxNullBitmap : categories_icon.at(cat));
+        bmp = m_bitmap_cache->insert(scaled_bitmap_name, bmps);
+    }
+
+    m_bmp = *bmp;
+}
+
+bool ObjectDataViewModelNode::update_settings_digest(const std::vector<std::string>& categories)
 {
     if (m_type != itSettings || m_opt_categories == categories)
         return false;
 
     m_opt_categories = categories;
     m_name = wxEmptyString;
-    m_bmp = m_empty_bmp;
-
-    std::map<std::string, wxBitmap>& categories_icon = Slic3r::GUI::wxGetApp().obj_list()->CATEGORY_ICON;
 
     for (auto& cat : m_opt_categories)
         m_name += cat + "; ";
     if (!m_name.IsEmpty())
         m_name.erase(m_name.Length()-2, 2); // Delete last "; "
 
-    wxBitmap *bmp = m_bitmap_cache->find(m_name.ToUTF8().data());
-    if (bmp == nullptr) {
-        std::vector<wxBitmap> bmps;
-        for (auto& cat : m_opt_categories)
-            bmps.emplace_back(categories_icon.find(cat) == categories_icon.end() ?
-                              wxNullBitmap : categories_icon.at(cat));
-        bmp = m_bitmap_cache->insert(m_name.ToUTF8().data(), bmps);
-    }
-
-    m_bmp = *bmp;
+    update_settings_digest_bitmaps();
 
     return true;
 }
 
+void ObjectDataViewModelNode::msw_rescale()
+{
+    if (!m_action_icon_name.empty())
+        m_action_icon = create_scaled_bitmap(nullptr, m_action_icon_name);
+
+    if (!m_opt_categories.empty())
+        update_settings_digest_bitmaps();
+}
+
 // *****************************************************************************
 // ----------------------------------------------------------------------------
-// PrusaObjectDataViewModel
+// ObjectDataViewModel
 // ----------------------------------------------------------------------------
 
-PrusaObjectDataViewModel::PrusaObjectDataViewModel()
+ObjectDataViewModel::ObjectDataViewModel()
 {
     m_bitmap_cache = new Slic3r::GUI::BitmapCache;
 }
 
-PrusaObjectDataViewModel::~PrusaObjectDataViewModel()
+ObjectDataViewModel::~ObjectDataViewModel()
 {
     for (auto object : m_objects)
 			delete object;
@@ -516,10 +397,10 @@ PrusaObjectDataViewModel::~PrusaObjectDataViewModel()
     m_bitmap_cache = nullptr;
 }
 
-wxDataViewItem PrusaObjectDataViewModel::Add(const wxString &name, const int extruder)
+wxDataViewItem ObjectDataViewModel::Add(const wxString &name, const int extruder)
 {
     const wxString extruder_str = extruder == 0 ? "default" : wxString::Format("%d", extruder);
-	auto root = new PrusaObjectDataViewModelNode(name, extruder_str);
+	auto root = new ObjectDataViewModelNode(name, extruder_str);
 	m_objects.push_back(root);
 	// notify control
 	wxDataViewItem child((void*)root);
@@ -528,13 +409,13 @@ wxDataViewItem PrusaObjectDataViewModel::Add(const wxString &name, const int ext
 	return child;
 }
 
-wxDataViewItem PrusaObjectDataViewModel::AddVolumeChild(const wxDataViewItem &parent_item,
-    const wxString &name,
-    const Slic3r::ModelVolumeType volume_type,
-    const int extruder/* = 0*/,
-    const bool create_frst_child/* = true*/)
+wxDataViewItem ObjectDataViewModel::AddVolumeChild( const wxDataViewItem &parent_item,
+                                                    const wxString &name,
+                                                    const Slic3r::ModelVolumeType volume_type,
+                                                    const int extruder/* = 0*/,
+                                                    const bool create_frst_child/* = true*/)
 {
-	PrusaObjectDataViewModelNode *root = (PrusaObjectDataViewModelNode*)parent_item.GetID();
+	ObjectDataViewModelNode *root = (ObjectDataViewModelNode*)parent_item.GetID();
 	if (!root) return wxDataViewItem(0);
 
     wxString extruder_str = extruder == 0 ? "default" : wxString::Format("%d", extruder);
@@ -546,7 +427,7 @@ wxDataViewItem PrusaObjectDataViewModel::AddVolumeChild(const wxDataViewItem &pa
 
     if (create_frst_child && root->m_volumes_cnt == 0)
     {
-		const auto node = new PrusaObjectDataViewModelNode(root, root->m_name, *m_volume_bmps[0], extruder_str, 0);
+		const auto node = new ObjectDataViewModelNode(root, root->m_name, *m_volume_bmps[0], extruder_str, 0);
         insert_position < 0 ? root->Append(node) : root->Insert(node, insert_position);
 		// notify control
 		const wxDataViewItem child((void*)node);
@@ -554,24 +435,28 @@ wxDataViewItem PrusaObjectDataViewModel::AddVolumeChild(const wxDataViewItem &pa
 
         root->m_volumes_cnt++;
         if (insert_position > 0) insert_position++;
+
+        node->m_volume_type = volume_type;
 	}
 
-    const auto node = new PrusaObjectDataViewModelNode(root, name, *m_volume_bmps[int(volume_type)], extruder_str, root->m_volumes_cnt);
+    const auto node = new ObjectDataViewModelNode(root, name, *m_volume_bmps[int(volume_type)], extruder_str, root->m_volumes_cnt);
     insert_position < 0 ? root->Append(node) : root->Insert(node, insert_position);
 	// notify control
 	const wxDataViewItem child((void*)node);
     ItemAdded(parent_item, child);
     root->m_volumes_cnt++;
 
+    node->m_volume_type = volume_type;
+
 	return child;
 }
 
-wxDataViewItem PrusaObjectDataViewModel::AddSettingsChild(const wxDataViewItem &parent_item)
+wxDataViewItem ObjectDataViewModel::AddSettingsChild(const wxDataViewItem &parent_item)
 {
-    PrusaObjectDataViewModelNode *root = (PrusaObjectDataViewModelNode*)parent_item.GetID();
+    ObjectDataViewModelNode *root = (ObjectDataViewModelNode*)parent_item.GetID();
     if (!root) return wxDataViewItem(0);
 
-    const auto node = new PrusaObjectDataViewModelNode(root, itSettings);
+    const auto node = new ObjectDataViewModelNode(root, itSettings);
     root->Insert(node, 0);
     // notify control
     const wxDataViewItem child((void*)node);
@@ -579,27 +464,27 @@ wxDataViewItem PrusaObjectDataViewModel::AddSettingsChild(const wxDataViewItem &
     return child;
 }
 
-int get_istances_root_idx(PrusaObjectDataViewModelNode *parent_node)
+int get_istances_root_idx(ObjectDataViewModelNode *parent_node)
 {
     // because of istance_root is a last item of the object
     const int inst_root_idx = parent_node->GetChildCount()-1;
 
-    if (inst_root_idx < 0 || parent_node->GetNthChild(inst_root_idx)->m_type == itInstanceRoot) 
+    if (inst_root_idx < 0 || parent_node->GetNthChild(inst_root_idx)->GetType() == itInstanceRoot) 
         return inst_root_idx;
     
     return -1;
 }
 
-wxDataViewItem PrusaObjectDataViewModel::AddInstanceChild(const wxDataViewItem &parent_item, size_t num)
+wxDataViewItem ObjectDataViewModel::AddInstanceChild(const wxDataViewItem &parent_item, size_t num)
 {
-    PrusaObjectDataViewModelNode *parent_node = (PrusaObjectDataViewModelNode*)parent_item.GetID();
+    ObjectDataViewModelNode *parent_node = (ObjectDataViewModelNode*)parent_item.GetID();
     if (!parent_node) return wxDataViewItem(0);
 
     // Check and create/get instances root node
     const int inst_root_id = get_istances_root_idx(parent_node);
 
-    PrusaObjectDataViewModelNode *inst_root_node = inst_root_id < 0 ? 
-                                                   new PrusaObjectDataViewModelNode(parent_node, itInstanceRoot) :
+    ObjectDataViewModelNode *inst_root_node = inst_root_id < 0 ? 
+                                                   new ObjectDataViewModelNode(parent_node, itInstanceRoot) :
                                                    parent_node->GetNthChild(inst_root_id);
     const wxDataViewItem inst_root_item((void*)inst_root_node);
 
@@ -611,10 +496,10 @@ wxDataViewItem PrusaObjectDataViewModel::AddInstanceChild(const wxDataViewItem &
     }
 
     // Add instance nodes
-    PrusaObjectDataViewModelNode *instance_node = nullptr;    
+    ObjectDataViewModelNode *instance_node = nullptr;    
     size_t counter = 0;
     while (counter < num) {
-        instance_node = new PrusaObjectDataViewModelNode(inst_root_node, itInstance);
+        instance_node = new ObjectDataViewModelNode(inst_root_node, itInstance);
         inst_root_node->Append(instance_node);
         // notify control
         const wxDataViewItem instance_item((void*)instance_node);
@@ -625,10 +510,10 @@ wxDataViewItem PrusaObjectDataViewModel::AddInstanceChild(const wxDataViewItem &
     return wxDataViewItem((void*)instance_node);
 }
 
-wxDataViewItem PrusaObjectDataViewModel::Delete(const wxDataViewItem &item)
+wxDataViewItem ObjectDataViewModel::Delete(const wxDataViewItem &item)
 {
 	auto ret_item = wxDataViewItem(0);
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	if (!node)      // happens if item.IsOk()==false
 		return ret_item;
 
@@ -676,12 +561,12 @@ wxDataViewItem PrusaObjectDataViewModel::Delete(const wxDataViewItem &item)
             delete node;
             ItemDeleted(parent, item);
 
-            PrusaObjectDataViewModelNode *last_instance_node = node_parent->GetNthChild(0);
+            ObjectDataViewModelNode *last_instance_node = node_parent->GetNthChild(0);
             node_parent->GetChildren().Remove(last_instance_node);
             delete last_instance_node;
             ItemDeleted(parent, wxDataViewItem(last_instance_node));
 
-            PrusaObjectDataViewModelNode *obj_node = node_parent->GetParent();
+            ObjectDataViewModelNode *obj_node = node_parent->GetParent();
             obj_node->GetChildren().Remove(node_parent);
             delete node_parent;
             ret_item = wxDataViewItem(obj_node);
@@ -712,7 +597,7 @@ wxDataViewItem PrusaObjectDataViewModel::Delete(const wxDataViewItem &item)
                 delete node;
                 ItemDeleted(parent, item);
 
-                PrusaObjectDataViewModelNode *last_child_node = node_parent->GetNthChild(vol_idx);
+                ObjectDataViewModelNode *last_child_node = node_parent->GetNthChild(vol_idx);
                 DeleteSettings(wxDataViewItem(last_child_node));
                 node_parent->GetChildren().Remove(last_child_node);
                 node_parent->m_volumes_cnt = 0;
@@ -771,17 +656,17 @@ wxDataViewItem PrusaObjectDataViewModel::Delete(const wxDataViewItem &item)
 	return ret_item;
 }
 
-wxDataViewItem PrusaObjectDataViewModel::DeleteLastInstance(const wxDataViewItem &parent_item, size_t num)
+wxDataViewItem ObjectDataViewModel::DeleteLastInstance(const wxDataViewItem &parent_item, size_t num)
 {
     auto ret_item = wxDataViewItem(0);
-    PrusaObjectDataViewModelNode *parent_node = (PrusaObjectDataViewModelNode*)parent_item.GetID();
+    ObjectDataViewModelNode *parent_node = (ObjectDataViewModelNode*)parent_item.GetID();
     if (!parent_node) return ret_item;
 
     const int inst_root_id = get_istances_root_idx(parent_node);
     if (inst_root_id < 0) return ret_item;
 
     wxDataViewItemArray items;
-    PrusaObjectDataViewModelNode *inst_root_node = parent_node->GetNthChild(inst_root_id);
+    ObjectDataViewModelNode *inst_root_node = parent_node->GetNthChild(inst_root_id);
     const wxDataViewItem inst_root_item((void*)inst_root_node);
 
     const int inst_cnt = inst_root_node->GetChildCount();
@@ -789,7 +674,7 @@ wxDataViewItem PrusaObjectDataViewModel::DeleteLastInstance(const wxDataViewItem
 
     int stop = delete_inst_root_item ? 0 : inst_cnt - num;
     for (int i = inst_cnt - 1; i >= stop;--i) {
-        PrusaObjectDataViewModelNode *last_instance_node = inst_root_node->GetNthChild(i);
+        ObjectDataViewModelNode *last_instance_node = inst_root_node->GetNthChild(i);
         inst_root_node->GetChildren().Remove(last_instance_node);
         delete last_instance_node;
         ItemDeleted(inst_root_item, wxDataViewItem(last_instance_node));
@@ -808,7 +693,7 @@ wxDataViewItem PrusaObjectDataViewModel::DeleteLastInstance(const wxDataViewItem
     return ret_item;
 }
 
-void PrusaObjectDataViewModel::DeleteAll()
+void ObjectDataViewModel::DeleteAll()
 {
 	while (!m_objects.empty())
 	{
@@ -818,9 +703,9 @@ void PrusaObjectDataViewModel::DeleteAll()
 	}
 }
 
-void PrusaObjectDataViewModel::DeleteChildren(wxDataViewItem& parent)
+void ObjectDataViewModel::DeleteChildren(wxDataViewItem& parent)
 {
-    PrusaObjectDataViewModelNode *root = (PrusaObjectDataViewModelNode*)parent.GetID();
+    ObjectDataViewModelNode *root = (ObjectDataViewModelNode*)parent.GetID();
     if (!root)      // happens if item.IsOk()==false
         return;
 
@@ -850,9 +735,9 @@ void PrusaObjectDataViewModel::DeleteChildren(wxDataViewItem& parent)
 #endif //__WXGTK__
 }
 
-void PrusaObjectDataViewModel::DeleteVolumeChildren(wxDataViewItem& parent)
+void ObjectDataViewModel::DeleteVolumeChildren(wxDataViewItem& parent)
 {
-    PrusaObjectDataViewModelNode *root = (PrusaObjectDataViewModelNode*)parent.GetID();
+    ObjectDataViewModelNode *root = (ObjectDataViewModelNode*)parent.GetID();
     if (!root)      // happens if item.IsOk()==false
         return;
 
@@ -884,9 +769,9 @@ void PrusaObjectDataViewModel::DeleteVolumeChildren(wxDataViewItem& parent)
 #endif //__WXGTK__
 }
 
-void PrusaObjectDataViewModel::DeleteSettings(const wxDataViewItem& parent)
+void ObjectDataViewModel::DeleteSettings(const wxDataViewItem& parent)
 {
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)parent.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)parent.GetID();
     if (!node) return;
 
     // if volume has a "settings"item, than delete it before volume deleting
@@ -899,7 +784,7 @@ void PrusaObjectDataViewModel::DeleteSettings(const wxDataViewItem& parent)
     }
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetItemById(int obj_idx)
+wxDataViewItem ObjectDataViewModel::GetItemById(int obj_idx)
 {
 	if (obj_idx >= m_objects.size())
 	{
@@ -910,7 +795,7 @@ wxDataViewItem PrusaObjectDataViewModel::GetItemById(int obj_idx)
 }
 
 
-wxDataViewItem PrusaObjectDataViewModel::GetItemByVolumeId(int obj_idx, int volume_idx)
+wxDataViewItem ObjectDataViewModel::GetItemByVolumeId(int obj_idx, int volume_idx)
 {
 	if (obj_idx >= m_objects.size() || obj_idx < 0) {
 		printf("Error! Out of objects range.\n");
@@ -934,7 +819,7 @@ wxDataViewItem PrusaObjectDataViewModel::GetItemByVolumeId(int obj_idx, int volu
     return wxDataViewItem(0);
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetItemByInstanceId(int obj_idx, int inst_idx)
+wxDataViewItem ObjectDataViewModel::GetItemByInstanceId(int obj_idx, int inst_idx)
 {
     if (obj_idx >= m_objects.size() || obj_idx < 0) {
         printf("Error! Out of objects range.\n");
@@ -945,7 +830,7 @@ wxDataViewItem PrusaObjectDataViewModel::GetItemByInstanceId(int obj_idx, int in
     if (!instances_item)
         return wxDataViewItem(0);
 
-    auto parent = (PrusaObjectDataViewModelNode*)instances_item.GetID();;
+    auto parent = (ObjectDataViewModelNode*)instances_item.GetID();;
     for (size_t i = 0; i < parent->GetChildCount(); i++)
         if (parent->GetNthChild(i)->m_idx == inst_idx)
             return wxDataViewItem(parent->GetNthChild(i));
@@ -953,11 +838,11 @@ wxDataViewItem PrusaObjectDataViewModel::GetItemByInstanceId(int obj_idx, int in
     return wxDataViewItem(0);
 }
 
-int PrusaObjectDataViewModel::GetIdByItem(const wxDataViewItem& item) const
+int ObjectDataViewModel::GetIdByItem(const wxDataViewItem& item) const
 {
 	wxASSERT(item.IsOk());
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	auto it = find(m_objects.begin(), m_objects.end(), node);
 	if (it == m_objects.end())
 		return -1;
@@ -965,44 +850,44 @@ int PrusaObjectDataViewModel::GetIdByItem(const wxDataViewItem& item) const
 	return it - m_objects.begin();
 }
 
-int PrusaObjectDataViewModel::GetIdByItemAndType(const wxDataViewItem& item, const ItemType type) const
+int ObjectDataViewModel::GetIdByItemAndType(const wxDataViewItem& item, const ItemType type) const
 {
 	wxASSERT(item.IsOk());
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	if (!node || node->m_type != type)
 		return -1;
 	return node->GetIdx();
 }
 
-int PrusaObjectDataViewModel::GetObjectIdByItem(const wxDataViewItem& item) const
+int ObjectDataViewModel::GetObjectIdByItem(const wxDataViewItem& item) const
 {
     return GetIdByItem(GetTopParent(item));
 }
 
-int PrusaObjectDataViewModel::GetVolumeIdByItem(const wxDataViewItem& item) const
+int ObjectDataViewModel::GetVolumeIdByItem(const wxDataViewItem& item) const
 {
     return GetIdByItemAndType(item, itVolume);
 }
 
-int PrusaObjectDataViewModel::GetInstanceIdByItem(const wxDataViewItem& item) const 
+int ObjectDataViewModel::GetInstanceIdByItem(const wxDataViewItem& item) const 
 {
     return GetIdByItemAndType(item, itInstance);
 }
 
-void PrusaObjectDataViewModel::GetItemInfo(const wxDataViewItem& item, ItemType& type, int& obj_idx, int& idx)
+void ObjectDataViewModel::GetItemInfo(const wxDataViewItem& item, ItemType& type, int& obj_idx, int& idx)
 {
     wxASSERT(item.IsOk());
     type = itUndef;
 
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     if (!node || node->GetIdx() <-1 || node->GetIdx() ==-1 && !(node->GetType() & (itObject | itSettings | itInstanceRoot)))
         return;
 
     idx = node->GetIdx();
     type = node->GetType();
 
-    PrusaObjectDataViewModelNode *parent_node = node->GetParent();
+    ObjectDataViewModelNode *parent_node = node->GetParent();
     if (!parent_node) return;
     if (type == itInstance)
         parent_node = node->GetParent()->GetParent();
@@ -1015,7 +900,7 @@ void PrusaObjectDataViewModel::GetItemInfo(const wxDataViewItem& item, ItemType&
         type = itUndef;
 }
 
-int PrusaObjectDataViewModel::GetRowByItem(const wxDataViewItem& item) const
+int ObjectDataViewModel::GetRowByItem(const wxDataViewItem& item) const
 {
     if (m_objects.empty())
         return -1;
@@ -1031,7 +916,7 @@ int PrusaObjectDataViewModel::GetRowByItem(const wxDataViewItem& item) const
         for (int j = 0; j < m_objects[i]->GetChildCount(); j++)
         {
             row_num++;
-            PrusaObjectDataViewModelNode* cur_node = m_objects[i]->GetNthChild(j);
+            ObjectDataViewModelNode* cur_node = m_objects[i]->GetNthChild(j);
             if (item == wxDataViewItem(cur_node))
                 return row_num;
 
@@ -1053,30 +938,30 @@ int PrusaObjectDataViewModel::GetRowByItem(const wxDataViewItem& item) const
     return -1;
 }
 
-wxString PrusaObjectDataViewModel::GetName(const wxDataViewItem &item) const
+wxString ObjectDataViewModel::GetName(const wxDataViewItem &item) const
 {
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	if (!node)      // happens if item.IsOk()==false
 		return wxEmptyString;
 
 	return node->m_name;
 }
 
-wxBitmap& PrusaObjectDataViewModel::GetBitmap(const wxDataViewItem &item) const
+wxBitmap& ObjectDataViewModel::GetBitmap(const wxDataViewItem &item) const
 {
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     return node->m_bmp;
 }
 
-void PrusaObjectDataViewModel::GetValue(wxVariant &variant, const wxDataViewItem &item, unsigned int col) const
+void ObjectDataViewModel::GetValue(wxVariant &variant, const wxDataViewItem &item, unsigned int col) const
 {
 	wxASSERT(item.IsOk());
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	switch (col)
 	{
 	case 0:
-        variant << PrusaDataViewBitmapText(node->m_name, node->m_bmp);
+        variant << DataViewBitmapText(node->m_name, node->m_bmp);
 		break;
 	case 1:
 		variant = node->m_extruder;
@@ -1089,83 +974,37 @@ void PrusaObjectDataViewModel::GetValue(wxVariant &variant, const wxDataViewItem
 	}
 }
 
-bool PrusaObjectDataViewModel::SetValue(const wxVariant &variant, const wxDataViewItem &item, unsigned int col)
+bool ObjectDataViewModel::SetValue(const wxVariant &variant, const wxDataViewItem &item, unsigned int col)
 {
 	wxASSERT(item.IsOk());
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	return node->SetValue(variant, col);
 }
 
-bool PrusaObjectDataViewModel::SetValue(const wxVariant &variant, const int item_idx, unsigned int col)
+bool ObjectDataViewModel::SetValue(const wxVariant &variant, const int item_idx, unsigned int col)
 {
 	if (item_idx < 0 || item_idx >= m_objects.size())
 		return false;
 
 	return m_objects[item_idx]->SetValue(variant, col);
 }
-/*
-wxDataViewItem PrusaObjectDataViewModel::MoveChildUp(const wxDataViewItem &item)
-{
-	auto ret_item = wxDataViewItem(0);
-	wxASSERT(item.IsOk());
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
-	if (!node)      // happens if item.IsOk()==false
-		return ret_item;
 
-	auto node_parent = node->GetParent();
-	if (!node_parent) // If isn't part, but object
-		return ret_item;
-
-	auto volume_id = node->GetVolumeId();
-	if (0 < volume_id && volume_id < node_parent->GetChildCount()) {
-		node_parent->SwapChildrens(volume_id - 1, volume_id);
-		ret_item = wxDataViewItem(node_parent->GetNthChild(volume_id - 1));
-		ItemChanged(item);
-		ItemChanged(ret_item);
-	}
-	else
-		ret_item = wxDataViewItem(node_parent->GetNthChild(0));
-	return ret_item;
-}
-
-wxDataViewItem PrusaObjectDataViewModel::MoveChildDown(const wxDataViewItem &item)
-{
-	auto ret_item = wxDataViewItem(0);
-	wxASSERT(item.IsOk());
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
-	if (!node)      // happens if item.IsOk()==false
-		return ret_item;
-
-	auto node_parent = node->GetParent();
-	if (!node_parent) // If isn't part, but object
-		return ret_item;
-
-	auto volume_id = node->GetVolumeId();
-	if (0 <= volume_id && volume_id+1 < node_parent->GetChildCount()) {
-		node_parent->SwapChildrens(volume_id + 1, volume_id);
-		ret_item = wxDataViewItem(node_parent->GetNthChild(volume_id + 1));
-		ItemChanged(item);
-		ItemChanged(ret_item);
-	}
-	else
-		ret_item = wxDataViewItem(node_parent->GetNthChild(node_parent->GetChildCount()-1));
-	return ret_item;
-}
-*/
-wxDataViewItem PrusaObjectDataViewModel::ReorganizeChildren(int current_volume_id, int new_volume_id, const wxDataViewItem &parent)
+wxDataViewItem ObjectDataViewModel::ReorganizeChildren( const int current_volume_id, 
+                                                        const int new_volume_id, 
+                                                        const wxDataViewItem &parent)
 {
     auto ret_item = wxDataViewItem(0);
     if (current_volume_id == new_volume_id)
         return ret_item;
     wxASSERT(parent.IsOk());
-    PrusaObjectDataViewModelNode *node_parent = (PrusaObjectDataViewModelNode*)parent.GetID();
+    ObjectDataViewModelNode *node_parent = (ObjectDataViewModelNode*)parent.GetID();
     if (!node_parent)      // happens if item.IsOk()==false
         return ret_item;
 
     const size_t shift = node_parent->GetChildren().Item(0)->m_type == itSettings ? 1 : 0;
 
-    PrusaObjectDataViewModelNode *deleted_node = node_parent->GetNthChild(current_volume_id+shift);
+    ObjectDataViewModelNode *deleted_node = node_parent->GetNthChild(current_volume_id+shift);
     node_parent->GetChildren().Remove(deleted_node);
     ItemDeleted(parent, wxDataViewItem(deleted_node));
     node_parent->Insert(deleted_node, new_volume_id+shift);
@@ -1184,22 +1023,22 @@ wxDataViewItem PrusaObjectDataViewModel::ReorganizeChildren(int current_volume_i
     return wxDataViewItem(node_parent->GetNthChild(new_volume_id+shift));
 }
 
-bool PrusaObjectDataViewModel::IsEnabled(const wxDataViewItem &item, unsigned int col) const
+bool ObjectDataViewModel::IsEnabled(const wxDataViewItem &item, unsigned int col) const
 {
     wxASSERT(item.IsOk());
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 
     // disable extruder selection for the non "itObject|itVolume" item
     return !(col == 1 && node->m_extruder.IsEmpty());
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetParent(const wxDataViewItem &item) const
+wxDataViewItem ObjectDataViewModel::GetParent(const wxDataViewItem &item) const
 {
 	// the invisible root node has no parent
 	if (!item.IsOk())
 		return wxDataViewItem(0);
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 
 	// objects nodes has no parent too
     if (node->m_type == itObject)
@@ -1208,17 +1047,17 @@ wxDataViewItem PrusaObjectDataViewModel::GetParent(const wxDataViewItem &item) c
 	return wxDataViewItem((void*)node->GetParent());
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetTopParent(const wxDataViewItem &item) const
+wxDataViewItem ObjectDataViewModel::GetTopParent(const wxDataViewItem &item) const
 {
 	// the invisible root node has no parent
 	if (!item.IsOk())
 		return wxDataViewItem(0);
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     if (node->m_type == itObject)
         return item;
 
-    PrusaObjectDataViewModelNode *parent_node = node->GetParent();
+    ObjectDataViewModelNode *parent_node = node->GetParent();
     while (parent_node->m_type != itObject)
     {
         node = parent_node;
@@ -1228,19 +1067,19 @@ wxDataViewItem PrusaObjectDataViewModel::GetTopParent(const wxDataViewItem &item
     return wxDataViewItem((void*)parent_node);
 }
 
-bool PrusaObjectDataViewModel::IsContainer(const wxDataViewItem &item) const
+bool ObjectDataViewModel::IsContainer(const wxDataViewItem &item) const
 {
 	// the invisible root node can have children
 	if (!item.IsOk())
 		return true;
 
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
 	return node->IsContainer();
 }
 
-unsigned int PrusaObjectDataViewModel::GetChildren(const wxDataViewItem &parent, wxDataViewItemArray &array) const
+unsigned int ObjectDataViewModel::GetChildren(const wxDataViewItem &parent, wxDataViewItemArray &array) const
 {
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)parent.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)parent.GetID();
 	if (!node)
 	{
 		for (auto object : m_objects)
@@ -1256,16 +1095,16 @@ unsigned int PrusaObjectDataViewModel::GetChildren(const wxDataViewItem &parent,
 	unsigned int count = node->GetChildren().GetCount();
 	for (unsigned int pos = 0; pos < count; pos++)
 	{
-		PrusaObjectDataViewModelNode *child = node->GetChildren().Item(pos);
+		ObjectDataViewModelNode *child = node->GetChildren().Item(pos);
 		array.Add(wxDataViewItem((void*)child));
 	}
 
 	return count;
 }
 
-void PrusaObjectDataViewModel::GetAllChildren(const wxDataViewItem &parent, wxDataViewItemArray &array) const
+void ObjectDataViewModel::GetAllChildren(const wxDataViewItem &parent, wxDataViewItemArray &array) const
 {
-	PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)parent.GetID();
+	ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)parent.GetID();
 	if (!node) {
 		for (auto object : m_objects)
 			array.Add(wxDataViewItem((void*)object));
@@ -1275,7 +1114,7 @@ void PrusaObjectDataViewModel::GetAllChildren(const wxDataViewItem &parent, wxDa
     else {
         const size_t count = node->GetChildren().GetCount();
         for (size_t pos = 0; pos < count; pos++) {
-            PrusaObjectDataViewModelNode *child = node->GetChildren().Item(pos);
+            ObjectDataViewModelNode *child = node->GetChildren().Item(pos);
             array.Add(wxDataViewItem((void*)child));
         }
     }
@@ -1289,20 +1128,20 @@ void PrusaObjectDataViewModel::GetAllChildren(const wxDataViewItem &parent, wxDa
     }
 }
 
-ItemType PrusaObjectDataViewModel::GetItemType(const wxDataViewItem &item) const 
+ItemType ObjectDataViewModel::GetItemType(const wxDataViewItem &item) const 
 {
     if (!item.IsOk())
         return itUndef;
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     return node->m_type;
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetItemByType(const wxDataViewItem &parent_item, ItemType type) const 
+wxDataViewItem ObjectDataViewModel::GetItemByType(const wxDataViewItem &parent_item, ItemType type) const 
 {
     if (!parent_item.IsOk())
         return wxDataViewItem(0);
 
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)parent_item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)parent_item.GetID();
     if (node->GetChildCount() == 0)
         return wxDataViewItem(0);
 
@@ -1314,60 +1153,81 @@ wxDataViewItem PrusaObjectDataViewModel::GetItemByType(const wxDataViewItem &par
     return wxDataViewItem(0);
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetSettingsItem(const wxDataViewItem &item) const
+wxDataViewItem ObjectDataViewModel::GetSettingsItem(const wxDataViewItem &item) const
 {
     return GetItemByType(item, itSettings);
 }
 
-wxDataViewItem PrusaObjectDataViewModel::GetInstanceRootItem(const wxDataViewItem &item) const
+wxDataViewItem ObjectDataViewModel::GetInstanceRootItem(const wxDataViewItem &item) const
 {
     return GetItemByType(item, itInstanceRoot);
 }
 
-bool PrusaObjectDataViewModel::IsSettingsItem(const wxDataViewItem &item) const
+bool ObjectDataViewModel::IsSettingsItem(const wxDataViewItem &item) const
 {
     if (!item.IsOk())
         return false;
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     return node->m_type == itSettings;
 }
 
-
-
-void PrusaObjectDataViewModel::UpdateSettingsDigest(const wxDataViewItem &item, 
+void ObjectDataViewModel::UpdateSettingsDigest(const wxDataViewItem &item, 
                                                     const std::vector<std::string>& categories)
 {
     if (!item.IsOk()) return;
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     if (!node->update_settings_digest(categories))
         return;
     ItemChanged(item);
 }
 
-void PrusaObjectDataViewModel::SetVolumeType(const wxDataViewItem &item, const Slic3r::ModelVolumeType type)
+void ObjectDataViewModel::SetVolumeType(const wxDataViewItem &item, const Slic3r::ModelVolumeType type)
 {
     if (!item.IsOk() || GetItemType(item) != itVolume) 
         return;
 
-    PrusaObjectDataViewModelNode *node = (PrusaObjectDataViewModelNode*)item.GetID();
+    ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
     node->SetBitmap(*m_volume_bmps[int(type)]);
     ItemChanged(item);
 }
 
+void ObjectDataViewModel::Rescale()
+{
+    wxDataViewItemArray all_items;
+    GetAllChildren(wxDataViewItem(0), all_items);
+
+    for (wxDataViewItem item : all_items)
+    {
+        if (!item.IsOk())
+            continue;
+
+        ObjectDataViewModelNode *node = (ObjectDataViewModelNode*)item.GetID();
+        node->msw_rescale();
+
+        if (node->m_type & itVolume)
+            node->m_bmp = *m_volume_bmps[node->volume_type()];
+
+        if (node->m_type & itObject && node->m_bmp.IsOk())
+            node->m_bmp = create_scaled_bitmap(nullptr, "exclamation");
+
+        ItemChanged(item);
+    }
+}
+
 //-----------------------------------------------------------------------------
 // PrusaDataViewBitmapText
 //-----------------------------------------------------------------------------
 
-wxIMPLEMENT_DYNAMIC_CLASS(PrusaDataViewBitmapText, wxObject)
+wxIMPLEMENT_DYNAMIC_CLASS(DataViewBitmapText, wxObject)
 
-IMPLEMENT_VARIANT_OBJECT(PrusaDataViewBitmapText)
+IMPLEMENT_VARIANT_OBJECT(DataViewBitmapText)
 
 // ---------------------------------------------------------
-// PrusaIconTextRenderer
+// BitmapTextRenderer
 // ---------------------------------------------------------
 
 #if ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
-PrusaBitmapTextRenderer::PrusaBitmapTextRenderer(wxDataViewCellMode mode /*= wxDATAVIEW_CELL_EDITABLE*/, 
+BitmapTextRenderer::BitmapTextRenderer(wxDataViewCellMode mode /*= wxDATAVIEW_CELL_EDITABLE*/, 
                                                  int align /*= wxDVR_DEFAULT_ALIGNMENT*/): 
 wxDataViewRenderer(wxT("PrusaDataViewBitmapText"), mode, align)
 {
@@ -1376,25 +1236,25 @@ wxDataViewRenderer(wxT("PrusaDataViewBitmapText"), mode, align)
 }
 #endif // ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
 
-bool PrusaBitmapTextRenderer::SetValue(const wxVariant &value)
+bool BitmapTextRenderer::SetValue(const wxVariant &value)
 {
     m_value << value;
     return true;
 }
 
-bool PrusaBitmapTextRenderer::GetValue(wxVariant& WXUNUSED(value)) const
+bool BitmapTextRenderer::GetValue(wxVariant& WXUNUSED(value)) const
 {
     return false;
 }
 
 #if ENABLE_NONCUSTOM_DATA_VIEW_RENDERING && wxUSE_ACCESSIBILITY
-wxString PrusaBitmapTextRenderer::GetAccessibleDescription() const
+wxString BitmapTextRenderer::GetAccessibleDescription() const
 {
     return m_value.GetText();
 }
 #endif // wxUSE_ACCESSIBILITY && ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
 
-bool PrusaBitmapTextRenderer::Render(wxRect rect, wxDC *dc, int state)
+bool BitmapTextRenderer::Render(wxRect rect, wxDC *dc, int state)
 {
     int xoffset = 0;
 
@@ -1410,7 +1270,7 @@ bool PrusaBitmapTextRenderer::Render(wxRect rect, wxDC *dc, int state)
     return true;
 }
 
-wxSize PrusaBitmapTextRenderer::GetSize() const
+wxSize BitmapTextRenderer::GetSize() const
 {
     if (!m_value.GetText().empty())
     {
@@ -1424,15 +1284,15 @@ wxSize PrusaBitmapTextRenderer::GetSize() const
 }
 
 
-wxWindow* PrusaBitmapTextRenderer::CreateEditorCtrl(wxWindow* parent, wxRect labelRect, const wxVariant& value)
+wxWindow* BitmapTextRenderer::CreateEditorCtrl(wxWindow* parent, wxRect labelRect, const wxVariant& value)
 {
     wxDataViewCtrl* const dv_ctrl = GetOwner()->GetOwner();
-    PrusaObjectDataViewModel* const model = dynamic_cast<PrusaObjectDataViewModel*>(dv_ctrl->GetModel());
+    ObjectDataViewModel* const model = dynamic_cast<ObjectDataViewModel*>(dv_ctrl->GetModel());
 
     if ( !(model->GetItemType(dv_ctrl->GetSelection()) & (itVolume | itObject)) )
         return nullptr;
 
-    PrusaDataViewBitmapText data;
+    DataViewBitmapText data;
     data << value;
 
     m_was_unusable_symbol = false;
@@ -1452,7 +1312,7 @@ wxWindow* PrusaBitmapTextRenderer::CreateEditorCtrl(wxWindow* parent, wxRect lab
     return text_editor;
 }
 
-bool PrusaBitmapTextRenderer::GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant& value)
+bool BitmapTextRenderer::GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant& value)
 {
     wxTextCtrl* text_editor = wxDynamicCast(ctrl, wxTextCtrl);
     if (!text_editor || text_editor->GetValue().IsEmpty())
@@ -1471,7 +1331,7 @@ bool PrusaBitmapTextRenderer::GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant&
     wxVariant valueOld;
     GetView()->GetModel()->GetValue(valueOld, m_item, 0); 
     
-    PrusaDataViewBitmapText bmpText;
+    DataViewBitmapText bmpText;
     bmpText << valueOld;
 
     // But replace the text with the value entered by user.
@@ -1482,19 +1342,19 @@ bool PrusaBitmapTextRenderer::GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant&
 }
 
 // ----------------------------------------------------------------------------
-// PrusaDoubleSlider
+// DoubleSlider
 // ----------------------------------------------------------------------------
-PrusaDoubleSlider::PrusaDoubleSlider(wxWindow *parent,
-                                        wxWindowID id,
-                                        int lowerValue, 
-                                        int higherValue, 
-                                        int minValue, 
-                                        int maxValue,
-                                        const wxPoint& pos,
-                                        const wxSize& size,
-                                        long style,
-                                        const wxValidator& val,
-                                        const wxString& name) : 
+DoubleSlider::DoubleSlider( wxWindow *parent,
+                            wxWindowID id,
+                            int lowerValue, 
+                            int higherValue, 
+                            int minValue, 
+                            int maxValue,
+                            const wxPoint& pos,
+                            const wxSize& size,
+                            long style,
+                            const wxValidator& val,
+                            const wxString& name) : 
     wxControl(parent, id, pos, size, wxWANTS_CHARS | wxBORDER_NONE),
     m_lower_value(lowerValue), m_higher_value (higherValue), 
     m_min_value(minValue), m_max_value(maxValue),
@@ -1506,39 +1366,39 @@ PrusaDoubleSlider::PrusaDoubleSlider(wxWindow *parent,
     if (!is_osx)
         SetDoubleBuffered(true);// SetDoubleBuffered exists on Win and Linux/GTK, but is missing on OSX
 
-    m_bmp_thumb_higher = wxBitmap(style == wxSL_HORIZONTAL ? create_scaled_bitmap(this, "right_half_circle.png") : create_scaled_bitmap(this, "up_half_circle.png",   16, true));
-    m_bmp_thumb_lower  = wxBitmap(style == wxSL_HORIZONTAL ? create_scaled_bitmap(this, "left_half_circle.png" ) : create_scaled_bitmap(this, "down_half_circle.png", 16, true));
-    m_thumb_size = m_bmp_thumb_lower.GetSize();
+    m_bmp_thumb_higher = (style == wxSL_HORIZONTAL ? ScalableBitmap(this, "right_half_circle.png") : ScalableBitmap(this, "up_half_circle.png",   16, true));
+    m_bmp_thumb_lower  = (style == wxSL_HORIZONTAL ? ScalableBitmap(this, "left_half_circle.png" ) : ScalableBitmap(this, "down_half_circle.png", 16, true));
+    m_thumb_size = m_bmp_thumb_lower.bmp().GetSize();
 
-    m_bmp_add_tick_on  = create_scaled_bitmap(this, "colorchange_add_on.png");
-    m_bmp_add_tick_off = create_scaled_bitmap(this, "colorchange_add_off.png");
-    m_bmp_del_tick_on  = create_scaled_bitmap(this, "colorchange_delete_on.png");
-    m_bmp_del_tick_off = create_scaled_bitmap(this, "colorchange_delete_off.png");
-    m_tick_icon_dim = m_bmp_add_tick_on.GetSize().x;
+    m_bmp_add_tick_on  = ScalableBitmap(this, "colorchange_add_on.png");
+    m_bmp_add_tick_off = ScalableBitmap(this, "colorchange_add_off.png");
+    m_bmp_del_tick_on  = ScalableBitmap(this, "colorchange_delete_on.png");
+    m_bmp_del_tick_off = ScalableBitmap(this, "colorchange_delete_off.png");
+    m_tick_icon_dim = m_bmp_add_tick_on.bmp().GetSize().x;
 
-    m_bmp_one_layer_lock_on    = create_scaled_bitmap(this, "one_layer_lock_on.png");
-    m_bmp_one_layer_lock_off   = create_scaled_bitmap(this, "one_layer_lock_off.png");
-    m_bmp_one_layer_unlock_on  = create_scaled_bitmap(this, "one_layer_unlock_on.png");
-    m_bmp_one_layer_unlock_off = create_scaled_bitmap(this, "one_layer_unlock_off.png");
-    m_lock_icon_dim = m_bmp_one_layer_lock_on.GetSize().x;
+    m_bmp_one_layer_lock_on    = ScalableBitmap(this, "one_layer_lock_on.png");
+    m_bmp_one_layer_lock_off   = ScalableBitmap(this, "one_layer_lock_off.png");
+    m_bmp_one_layer_unlock_on  = ScalableBitmap(this, "one_layer_unlock_on.png");
+    m_bmp_one_layer_unlock_off = ScalableBitmap(this, "one_layer_unlock_off.png");
+    m_lock_icon_dim = m_bmp_one_layer_lock_on.bmp().GetSize().x;
 
     m_selection = ssUndef;
 
     // slider events
-    Bind(wxEVT_PAINT,       &PrusaDoubleSlider::OnPaint,    this);
-    Bind(wxEVT_LEFT_DOWN,   &PrusaDoubleSlider::OnLeftDown, this);
-    Bind(wxEVT_MOTION,      &PrusaDoubleSlider::OnMotion,   this);
-    Bind(wxEVT_LEFT_UP,     &PrusaDoubleSlider::OnLeftUp,   this);
-    Bind(wxEVT_MOUSEWHEEL,  &PrusaDoubleSlider::OnWheel,    this);
-    Bind(wxEVT_ENTER_WINDOW,&PrusaDoubleSlider::OnEnterWin, this);
-    Bind(wxEVT_LEAVE_WINDOW,&PrusaDoubleSlider::OnLeaveWin, this);
-    Bind(wxEVT_KEY_DOWN,    &PrusaDoubleSlider::OnKeyDown,  this);
-    Bind(wxEVT_KEY_UP,      &PrusaDoubleSlider::OnKeyUp,    this);
-    Bind(wxEVT_RIGHT_DOWN,  &PrusaDoubleSlider::OnRightDown,this);
-    Bind(wxEVT_RIGHT_UP,    &PrusaDoubleSlider::OnRightUp,  this);
+    Bind(wxEVT_PAINT,       &DoubleSlider::OnPaint,    this);
+    Bind(wxEVT_LEFT_DOWN,   &DoubleSlider::OnLeftDown, this);
+    Bind(wxEVT_MOTION,      &DoubleSlider::OnMotion,   this);
+    Bind(wxEVT_LEFT_UP,     &DoubleSlider::OnLeftUp,   this);
+    Bind(wxEVT_MOUSEWHEEL,  &DoubleSlider::OnWheel,    this);
+    Bind(wxEVT_ENTER_WINDOW,&DoubleSlider::OnEnterWin, this);
+    Bind(wxEVT_LEAVE_WINDOW,&DoubleSlider::OnLeaveWin, this);
+    Bind(wxEVT_KEY_DOWN,    &DoubleSlider::OnKeyDown,  this);
+    Bind(wxEVT_KEY_UP,      &DoubleSlider::OnKeyUp,    this);
+    Bind(wxEVT_RIGHT_DOWN,  &DoubleSlider::OnRightDown,this);
+    Bind(wxEVT_RIGHT_UP,    &DoubleSlider::OnRightUp,  this);
 
     // control's view variables
-    SLIDER_MARGIN     = 4 + Slic3r::GUI::wxGetApp().em_unit();//(style == wxSL_HORIZONTAL ? m_bmp_thumb_higher.GetWidth() : m_bmp_thumb_higher.GetHeight());
+    SLIDER_MARGIN     = 4 + Slic3r::GUI::wxGetApp().em_unit();
 
     DARK_ORANGE_PEN   = wxPen(wxColour(253, 84, 2));
     ORANGE_PEN        = wxPen(wxColour(253, 126, 66));
@@ -1548,32 +1408,65 @@ PrusaDoubleSlider::PrusaDoubleSlider(wxWindow *parent,
     GREY_PEN          = wxPen(wxColour(164, 164, 164));
     LIGHT_GREY_PEN    = wxPen(wxColour(204, 204, 204));
 
-    line_pens = { &DARK_GREY_PEN, &GREY_PEN, &LIGHT_GREY_PEN };
-    segm_pens = { &DARK_ORANGE_PEN, &ORANGE_PEN, &LIGHT_ORANGE_PEN };
+    m_line_pens = { &DARK_GREY_PEN, &GREY_PEN, &LIGHT_GREY_PEN };
+    m_segm_pens = { &DARK_ORANGE_PEN, &ORANGE_PEN, &LIGHT_ORANGE_PEN };
 
     const wxFont& font = GetFont();
     m_font = is_osx ? font.Smaller().Smaller() : font.Smaller();
 }
 
-int PrusaDoubleSlider::GetActiveValue() const
+void DoubleSlider::msw_rescale()
+{
+    const wxFont& font = Slic3r::GUI::wxGetApp().normal_font();
+    m_font = is_osx ? font.Smaller().Smaller() : font.Smaller();
+
+    m_bmp_thumb_higher.msw_rescale();
+    m_bmp_thumb_lower .msw_rescale();
+    m_thumb_size = m_bmp_thumb_lower.bmp().GetSize();
+
+    m_bmp_add_tick_on .msw_rescale();
+    m_bmp_add_tick_off.msw_rescale();
+    m_bmp_del_tick_on .msw_rescale();
+    m_bmp_del_tick_off.msw_rescale();
+    m_tick_icon_dim = m_bmp_add_tick_on.bmp().GetSize().x;
+
+    m_bmp_one_layer_lock_on   .msw_rescale();
+    m_bmp_one_layer_lock_off  .msw_rescale();
+    m_bmp_one_layer_unlock_on .msw_rescale();
+    m_bmp_one_layer_unlock_off.msw_rescale();
+    m_lock_icon_dim = m_bmp_one_layer_lock_on.bmp().GetSize().x;
+
+    SLIDER_MARGIN = 4 + Slic3r::GUI::wxGetApp().em_unit();
+
+    SetMinSize(get_min_size());
+    GetParent()->Layout();
+}
+
+int DoubleSlider::GetActiveValue() const
 {
     return m_selection == ssLower ?
     m_lower_value : m_selection == ssHigher ?
                 m_higher_value : -1;
 }
 
-wxSize PrusaDoubleSlider::DoGetBestSize() const
+wxSize DoubleSlider::get_min_size() const 
+{
+    const int min_side = is_horizontal() ?
+        (is_osx ? 8 : 6) * Slic3r::GUI::wxGetApp().em_unit() :
+        /*(is_osx ? 10 : 8)*/10 * Slic3r::GUI::wxGetApp().em_unit();
+
+    return wxSize(min_side, min_side);
+}
+
+wxSize DoubleSlider::DoGetBestSize() const
 {
     const wxSize size = wxControl::DoGetBestSize();
     if (size.x > 1 && size.y > 1)
         return size;
-    const int new_size = is_horizontal() ? 
-                         (is_osx ? 8 : 6) * Slic3r::GUI::wxGetApp().em_unit() :
-                         (is_osx ? 10 : 8) * Slic3r::GUI::wxGetApp().em_unit();
-    return wxSize(new_size, new_size);
+    return get_min_size();
 }
 
-void PrusaDoubleSlider::SetLowerValue(const int lower_val)
+void DoubleSlider::SetLowerValue(const int lower_val)
 {
     m_selection = ssLower;
     m_lower_value = lower_val;
@@ -1586,7 +1479,7 @@ void PrusaDoubleSlider::SetLowerValue(const int lower_val)
     ProcessWindowEvent(e);
 }
 
-void PrusaDoubleSlider::SetHigherValue(const int higher_val)
+void DoubleSlider::SetHigherValue(const int higher_val)
 {
     m_selection = ssHigher;
     m_higher_value = higher_val;
@@ -1599,7 +1492,7 @@ void PrusaDoubleSlider::SetHigherValue(const int higher_val)
     ProcessWindowEvent(e);
 }
 
-void PrusaDoubleSlider::SetSelectionSpan(const int lower_val, const int higher_val)
+void DoubleSlider::SetSelectionSpan(const int lower_val, const int higher_val)
 {
     m_lower_value  = std::max(lower_val, m_min_value);
     m_higher_value = std::max(std::min(higher_val, m_max_value), m_lower_value);
@@ -1614,14 +1507,14 @@ void PrusaDoubleSlider::SetSelectionSpan(const int lower_val, const int higher_v
     ProcessWindowEvent(e);
 }
 
-void PrusaDoubleSlider::SetMaxValue(const int max_value)
+void DoubleSlider::SetMaxValue(const int max_value)
 {
     m_max_value = max_value;
     Refresh();
     Update();
 }
 
-void PrusaDoubleSlider::draw_scroll_line(wxDC& dc, const int lower_pos, const int higher_pos)
+void DoubleSlider::draw_scroll_line(wxDC& dc, const int lower_pos, const int higher_pos)
 {
     int width;
     int height;
@@ -1637,11 +1530,11 @@ void PrusaDoubleSlider::draw_scroll_line(wxDC& dc, const int lower_pos, const in
     wxCoord segm_end_x = is_horizontal() ? higher_pos : width*0.5 - 1;
     wxCoord segm_end_y = is_horizontal() ? height*0.5 - 1 : higher_pos-1;
 
-    for (int id = 0; id < line_pens.size(); id++)
+    for (int id = 0; id < m_line_pens.size(); id++)
     {
-        dc.SetPen(*line_pens[id]);
+        dc.SetPen(*m_line_pens[id]);
         dc.DrawLine(line_beg_x, line_beg_y, line_end_x, line_end_y);
-        dc.SetPen(*segm_pens[id]);
+        dc.SetPen(*m_segm_pens[id]);
         dc.DrawLine(segm_beg_x, segm_beg_y, segm_end_x, segm_end_y);
         if (is_horizontal())
             line_beg_y = line_end_y = segm_beg_y = segm_end_y += 1;
@@ -1650,7 +1543,7 @@ void PrusaDoubleSlider::draw_scroll_line(wxDC& dc, const int lower_pos, const in
     }
 }
 
-double PrusaDoubleSlider::get_scroll_step()
+double DoubleSlider::get_scroll_step()
 {
     const wxSize sz = get_size();
     const int& slider_len = m_style == wxSL_HORIZONTAL ? sz.x : sz.y;
@@ -1658,27 +1551,27 @@ double PrusaDoubleSlider::get_scroll_step()
 }
 
 // get position on the slider line from entered value
-wxCoord PrusaDoubleSlider::get_position_from_value(const int value)
+wxCoord DoubleSlider::get_position_from_value(const int value)
 {
     const double step = get_scroll_step();
     const int val = is_horizontal() ? value : m_max_value - value;
     return wxCoord(SLIDER_MARGIN + int(val*step + 0.5));
 }
 
-wxSize PrusaDoubleSlider::get_size()
+wxSize DoubleSlider::get_size()
 {
     int w, h;
     get_size(&w, &h);
     return wxSize(w, h);
 }
 
-void PrusaDoubleSlider::get_size(int *w, int *h)
+void DoubleSlider::get_size(int *w, int *h)
 {
     GetSize(w, h);
     is_horizontal() ? *w -= m_lock_icon_dim : *h -= m_lock_icon_dim;
 }
 
-double PrusaDoubleSlider::get_double_value(const SelectedSlider& selection)
+double DoubleSlider::get_double_value(const SelectedSlider& selection)
 {
     if (m_values.empty() || m_lower_value<0)
         return 0.0;
@@ -1689,7 +1582,7 @@ double PrusaDoubleSlider::get_double_value(const SelectedSlider& selection)
     return m_values[selection == ssLower ? m_lower_value : m_higher_value].second;
 }
 
-std::vector<double> PrusaDoubleSlider::GetTicksValues() const
+std::vector<double> DoubleSlider::GetTicksValues() const
 {
     std::vector<double> values;
 
@@ -1703,7 +1596,7 @@ std::vector<double> PrusaDoubleSlider::GetTicksValues() const
     return values;
 }
 
-void PrusaDoubleSlider::SetTicksValues(const std::vector<double>& heights)
+void DoubleSlider::SetTicksValues(const std::vector<double>& heights)
 {
     if (m_values.empty())
         return;
@@ -1725,7 +1618,7 @@ void PrusaDoubleSlider::SetTicksValues(const std::vector<double>& heights)
         wxPostEvent(this->GetParent(), wxCommandEvent(wxCUSTOMEVT_TICKSCHANGED));
 }
 
-void PrusaDoubleSlider::get_lower_and_higher_position(int& lower_pos, int& higher_pos)
+void DoubleSlider::get_lower_and_higher_position(int& lower_pos, int& higher_pos)
 {
     const double step = get_scroll_step();
     if (is_horizontal()) {
@@ -1738,7 +1631,7 @@ void PrusaDoubleSlider::get_lower_and_higher_position(int& lower_pos, int& highe
     }
 }
 
-void PrusaDoubleSlider::draw_focus_rect()
+void DoubleSlider::draw_focus_rect()
 {
     if (!m_is_focused) 
         return;
@@ -1750,7 +1643,7 @@ void PrusaDoubleSlider::draw_focus_rect()
     dc.DrawRectangle(1, 1, sz.x - 2, sz.y - 2);
 }
 
-void PrusaDoubleSlider::render()
+void DoubleSlider::render()
 {
     SetBackgroundColour(GetParent()->GetBackgroundColour());
     draw_focus_rect();
@@ -1783,12 +1676,13 @@ void PrusaDoubleSlider::render()
     draw_one_layer_icon(dc);
 }
 
-void PrusaDoubleSlider::draw_action_icon(wxDC& dc, const wxPoint pt_beg, const wxPoint pt_end)
+void DoubleSlider::draw_action_icon(wxDC& dc, const wxPoint pt_beg, const wxPoint pt_end)
 {
     const int tick = m_selection == ssLower ? m_lower_value : m_higher_value;
-    wxBitmap* icon = m_is_action_icon_focesed ? &m_bmp_add_tick_off : &m_bmp_add_tick_on;
+
+    wxBitmap& icon = m_is_action_icon_focesed ? m_bmp_add_tick_off.bmp() : m_bmp_add_tick_on.bmp();
     if (m_ticks.find(tick) != m_ticks.end())
-        icon = m_is_action_icon_focesed ? &m_bmp_del_tick_off : &m_bmp_del_tick_on;
+        icon = m_is_action_icon_focesed ? m_bmp_del_tick_off.bmp() : m_bmp_del_tick_on.bmp();
 
     wxCoord x_draw, y_draw;
     is_horizontal() ? x_draw = pt_beg.x - 0.5*m_tick_icon_dim : y_draw = pt_beg.y - 0.5*m_tick_icon_dim;
@@ -1797,13 +1691,13 @@ void PrusaDoubleSlider::draw_action_icon(wxDC& dc, const wxPoint pt_beg, const w
     else
         is_horizontal() ? y_draw = pt_beg.y - m_tick_icon_dim-2 : x_draw = pt_end.x + 3;
 
-    dc.DrawBitmap(*icon, x_draw, y_draw);
+    dc.DrawBitmap(icon, x_draw, y_draw);
 
     //update rect of the tick action icon
     m_rect_tick_action = wxRect(x_draw, y_draw, m_tick_icon_dim, m_tick_icon_dim);
 }
 
-void PrusaDoubleSlider::draw_info_line_with_icon(wxDC& dc, const wxPoint& pos, const SelectedSlider selection)
+void DoubleSlider::draw_info_line_with_icon(wxDC& dc, const wxPoint& pos, const SelectedSlider selection)
 {
     if (m_selection == selection) {
         //draw info line
@@ -1818,7 +1712,7 @@ void PrusaDoubleSlider::draw_info_line_with_icon(wxDC& dc, const wxPoint& pos, c
     }
 }
 
-wxString PrusaDoubleSlider::get_label(const SelectedSlider& selection) const
+wxString DoubleSlider::get_label(const SelectedSlider& selection) const
 {
     const int value = selection == ssLower ? m_lower_value : m_higher_value;
 
@@ -1833,7 +1727,7 @@ wxString PrusaDoubleSlider::get_label(const SelectedSlider& selection) const
     return wxString::Format("%s\n(%d)", str, m_values.empty() ? value : m_values[value].first);
 }
 
-void PrusaDoubleSlider::draw_thumb_text(wxDC& dc, const wxPoint& pos, const SelectedSlider& selection) const
+void DoubleSlider::draw_thumb_text(wxDC& dc, const wxPoint& pos, const SelectedSlider& selection) const
 {
     if ((m_is_one_layer || m_higher_value==m_lower_value) && selection != m_selection || !selection) 
         return;
@@ -1850,7 +1744,7 @@ void PrusaDoubleSlider::draw_thumb_text(wxDC& dc, const wxPoint& pos, const Sele
     dc.DrawText(label, text_pos);
 }
 
-void PrusaDoubleSlider::draw_thumb_item(wxDC& dc, const wxPoint& pos, const SelectedSlider& selection)
+void DoubleSlider::draw_thumb_item(wxDC& dc, const wxPoint& pos, const SelectedSlider& selection)
 {
     wxCoord x_draw, y_draw;
     if (selection == ssLower) {
@@ -1873,13 +1767,13 @@ void PrusaDoubleSlider::draw_thumb_item(wxDC& dc, const wxPoint& pos, const Sele
             y_draw = pos.y - m_thumb_size.y;
         }
     }
-    dc.DrawBitmap(selection == ssLower ? m_bmp_thumb_lower : m_bmp_thumb_higher, x_draw, y_draw);
+    dc.DrawBitmap(selection == ssLower ? m_bmp_thumb_lower.bmp() : m_bmp_thumb_higher.bmp(), x_draw, y_draw);
 
     // Update thumb rect
     update_thumb_rect(x_draw, y_draw, selection);
 }
 
-void PrusaDoubleSlider::draw_thumb(wxDC& dc, const wxCoord& pos_coord, const SelectedSlider& selection)
+void DoubleSlider::draw_thumb(wxDC& dc, const wxCoord& pos_coord, const SelectedSlider& selection)
 {
     //calculate thumb position on slider line
     int width, height;
@@ -1896,7 +1790,7 @@ void PrusaDoubleSlider::draw_thumb(wxDC& dc, const wxCoord& pos_coord, const Sel
     draw_thumb_text(dc, pos, selection);
 }
 
-void PrusaDoubleSlider::draw_thumbs(wxDC& dc, const wxCoord& lower_pos, const wxCoord& higher_pos)
+void DoubleSlider::draw_thumbs(wxDC& dc, const wxCoord& lower_pos, const wxCoord& higher_pos)
 {
     //calculate thumb position on slider line
     int width, height;
@@ -1920,7 +1814,7 @@ void PrusaDoubleSlider::draw_thumbs(wxDC& dc, const wxCoord& lower_pos, const wx
     draw_thumb_text(dc, pos_l, ssLower);
 }
 
-void PrusaDoubleSlider::draw_ticks(wxDC& dc)
+void DoubleSlider::draw_ticks(wxDC& dc)
 {
     dc.SetPen(m_is_enabled_tick_manipulation ? DARK_GREY_PEN : LIGHT_GREY_PEN );
     int height, width;
@@ -1937,7 +1831,7 @@ void PrusaDoubleSlider::draw_ticks(wxDC& dc)
     }
 }
 
-void PrusaDoubleSlider::draw_colored_band(wxDC& dc)
+void DoubleSlider::draw_colored_band(wxDC& dc)
 {
     int height, width;
     get_size(&width, &height);
@@ -1987,11 +1881,11 @@ void PrusaDoubleSlider::draw_colored_band(wxDC& dc)
     }
 }
 
-void PrusaDoubleSlider::draw_one_layer_icon(wxDC& dc)
+void DoubleSlider::draw_one_layer_icon(wxDC& dc)
 {
-    wxBitmap* icon = m_is_one_layer ?
-                     m_is_one_layer_icon_focesed ? &m_bmp_one_layer_lock_off : &m_bmp_one_layer_lock_on :
-                     m_is_one_layer_icon_focesed ? &m_bmp_one_layer_unlock_off : &m_bmp_one_layer_unlock_on;
+    const wxBitmap& icon = m_is_one_layer ?
+                     m_is_one_layer_icon_focesed ? m_bmp_one_layer_lock_off.bmp()   : m_bmp_one_layer_lock_on.bmp() :
+                     m_is_one_layer_icon_focesed ? m_bmp_one_layer_unlock_off.bmp() : m_bmp_one_layer_unlock_on.bmp();
 
     int width, height;
     get_size(&width, &height);
@@ -2000,13 +1894,13 @@ void PrusaDoubleSlider::draw_one_layer_icon(wxDC& dc)
     is_horizontal() ? x_draw = width-2 : x_draw = 0.5*width - 0.5*m_lock_icon_dim;
     is_horizontal() ? y_draw = 0.5*height - 0.5*m_lock_icon_dim : y_draw = height-2;
 
-    dc.DrawBitmap(*icon, x_draw, y_draw);
+    dc.DrawBitmap(icon, x_draw, y_draw);
 
     //update rect of the lock/unlock icon
     m_rect_one_layer_icon = wxRect(x_draw, y_draw, m_lock_icon_dim, m_lock_icon_dim);
 }
 
-void PrusaDoubleSlider::update_thumb_rect(const wxCoord& begin_x, const wxCoord& begin_y, const SelectedSlider& selection)
+void DoubleSlider::update_thumb_rect(const wxCoord& begin_x, const wxCoord& begin_y, const SelectedSlider& selection)
 {
     const wxRect& rect = wxRect(begin_x, begin_y, m_thumb_size.x, m_thumb_size.y);
     if (selection == ssLower)
@@ -2015,7 +1909,7 @@ void PrusaDoubleSlider::update_thumb_rect(const wxCoord& begin_x, const wxCoord&
         m_rect_higher_thumb = rect;
 }
 
-int PrusaDoubleSlider::get_value_from_position(const wxCoord x, const wxCoord y)
+int DoubleSlider::get_value_from_position(const wxCoord x, const wxCoord y)
 {
     const int height = get_size().y;
     const double step = get_scroll_step();
@@ -2026,13 +1920,13 @@ int PrusaDoubleSlider::get_value_from_position(const wxCoord x, const wxCoord y)
         return int(m_min_value + double(height - SLIDER_MARGIN - y) / step + 0.5);
 }
 
-void PrusaDoubleSlider::detect_selected_slider(const wxPoint& pt)
+void DoubleSlider::detect_selected_slider(const wxPoint& pt)
 {
     m_selection = is_point_in_rect(pt, m_rect_lower_thumb) ? ssLower :
                   is_point_in_rect(pt, m_rect_higher_thumb) ? ssHigher : ssUndef;
 }
 
-bool PrusaDoubleSlider::is_point_in_rect(const wxPoint& pt, const wxRect& rect)
+bool DoubleSlider::is_point_in_rect(const wxPoint& pt, const wxRect& rect)
 {
     if (rect.GetLeft() <= pt.x && pt.x <= rect.GetRight() && 
         rect.GetTop()  <= pt.y && pt.y <= rect.GetBottom())
@@ -2040,7 +1934,7 @@ bool PrusaDoubleSlider::is_point_in_rect(const wxPoint& pt, const wxRect& rect)
     return false;
 }
 
-int PrusaDoubleSlider::is_point_near_tick(const wxPoint& pt)
+int DoubleSlider::is_point_near_tick(const wxPoint& pt)
 {
     for (auto tick : m_ticks) {
         const wxCoord pos = get_position_from_value(tick);
@@ -2057,7 +1951,7 @@ int PrusaDoubleSlider::is_point_near_tick(const wxPoint& pt)
     return -1;
 }
 
-void PrusaDoubleSlider::ChangeOneLayerLock()
+void DoubleSlider::ChangeOneLayerLock()
 {
     m_is_one_layer = !m_is_one_layer;
     m_selection == ssLower ? correct_lower_value() : correct_higher_value();
@@ -2071,7 +1965,7 @@ void PrusaDoubleSlider::ChangeOneLayerLock()
     ProcessWindowEvent(e);
 }
 
-void PrusaDoubleSlider::OnLeftDown(wxMouseEvent& event)
+void DoubleSlider::OnLeftDown(wxMouseEvent& event)
 {
     this->CaptureMouse();
     wxClientDC dc(this);
@@ -2116,7 +2010,7 @@ void PrusaDoubleSlider::OnLeftDown(wxMouseEvent& event)
     event.Skip();
 }
 
-void PrusaDoubleSlider::correct_lower_value()
+void DoubleSlider::correct_lower_value()
 {
     if (m_lower_value < m_min_value)
         m_lower_value = m_min_value;
@@ -2127,7 +2021,7 @@ void PrusaDoubleSlider::correct_lower_value()
         m_higher_value = m_lower_value;
 }
 
-void PrusaDoubleSlider::correct_higher_value()
+void DoubleSlider::correct_higher_value()
 {
     if (m_higher_value > m_max_value)
         m_higher_value = m_max_value;
@@ -2138,7 +2032,7 @@ void PrusaDoubleSlider::correct_higher_value()
         m_lower_value = m_higher_value;
 }
 
-void PrusaDoubleSlider::OnMotion(wxMouseEvent& event)
+void DoubleSlider::OnMotion(wxMouseEvent& event)
 {
     bool action = false;
 
@@ -2172,7 +2066,7 @@ void PrusaDoubleSlider::OnMotion(wxMouseEvent& event)
     }
 }
 
-void PrusaDoubleSlider::OnLeftUp(wxMouseEvent& event)
+void DoubleSlider::OnLeftUp(wxMouseEvent& event)
 {
     if (!HasCapture())
         return;
@@ -2187,7 +2081,7 @@ void PrusaDoubleSlider::OnLeftUp(wxMouseEvent& event)
     ProcessWindowEvent(e);
 }
 
-void PrusaDoubleSlider::enter_window(wxMouseEvent& event, const bool enter)
+void DoubleSlider::enter_window(wxMouseEvent& event, const bool enter)
 {
     m_is_focused = enter;
     Refresh();
@@ -2198,7 +2092,7 @@ void PrusaDoubleSlider::enter_window(wxMouseEvent& event, const bool enter)
 // "condition" have to be true for:
 //    -  value increase (if wxSL_VERTICAL)
 //    -  value decrease (if wxSL_HORIZONTAL) 
-void PrusaDoubleSlider::move_current_thumb(const bool condition)
+void DoubleSlider::move_current_thumb(const bool condition)
 {
 //     m_is_one_layer = wxGetKeyState(WXK_CONTROL);
     int delta = condition ? -1 : 1;
@@ -2221,7 +2115,7 @@ void PrusaDoubleSlider::move_current_thumb(const bool condition)
     ProcessWindowEvent(e);
 }
 
-void PrusaDoubleSlider::action_tick(const TicksAction action)
+void DoubleSlider::action_tick(const TicksAction action)
 {
     if (m_selection == ssUndef)
         return;
@@ -2245,7 +2139,7 @@ void PrusaDoubleSlider::action_tick(const TicksAction action)
     Update();
 }
 
-void PrusaDoubleSlider::OnWheel(wxMouseEvent& event)
+void DoubleSlider::OnWheel(wxMouseEvent& event)
 {
     // Set nearest to the mouse thumb as a selected, if there is not selected thumb
     if (m_selection == ssUndef) 
@@ -2265,7 +2159,7 @@ void PrusaDoubleSlider::OnWheel(wxMouseEvent& event)
     move_current_thumb(event.GetWheelRotation() > 0);
 }
 
-void PrusaDoubleSlider::OnKeyDown(wxKeyEvent &event)
+void DoubleSlider::OnKeyDown(wxKeyEvent &event)
 {
     const int key = event.GetKeyCode();
     if (key == '+' || key == WXK_NUMPAD_ADD)
@@ -2291,7 +2185,7 @@ void PrusaDoubleSlider::OnKeyDown(wxKeyEvent &event)
     }
 }
 
-void PrusaDoubleSlider::OnKeyUp(wxKeyEvent &event)
+void DoubleSlider::OnKeyUp(wxKeyEvent &event)
 {
     if (event.GetKeyCode() == WXK_CONTROL)
         m_is_one_layer = false;
@@ -2300,7 +2194,7 @@ void PrusaDoubleSlider::OnKeyUp(wxKeyEvent &event)
     event.Skip();
 }
 
-void PrusaDoubleSlider::OnRightDown(wxMouseEvent& event)
+void DoubleSlider::OnRightDown(wxMouseEvent& event)
 {
     this->CaptureMouse();
     const wxClientDC dc(this);
@@ -2320,7 +2214,7 @@ void PrusaDoubleSlider::OnRightDown(wxMouseEvent& event)
     event.Skip();
 }
 
-void PrusaDoubleSlider::OnRightUp(wxMouseEvent& event)
+void DoubleSlider::OnRightUp(wxMouseEvent& event)
 {
     if (!HasCapture())
         return;
@@ -2334,34 +2228,33 @@ void PrusaDoubleSlider::OnRightUp(wxMouseEvent& event)
 
 
 // ----------------------------------------------------------------------------
-// PrusaLockButton
+// LockButton
 // ----------------------------------------------------------------------------
 
-PrusaLockButton::PrusaLockButton(   wxWindow *parent, 
-                                    wxWindowID id, 
-                                    const wxPoint& pos /*= wxDefaultPosition*/, 
-                                    const wxSize& size /*= wxDefaultSize*/):
-                                    wxButton(parent, id, wxEmptyString, pos, size, wxBU_EXACTFIT | wxNO_BORDER)
+LockButton::LockButton( wxWindow *parent, 
+                        wxWindowID id, 
+                        const wxPoint& pos /*= wxDefaultPosition*/, 
+                        const wxSize& size /*= wxDefaultSize*/):
+                        wxButton(parent, id, wxEmptyString, pos, size, wxBU_EXACTFIT | wxNO_BORDER)
 {
-    m_bmp_lock_on      = create_scaled_bitmap(this, "one_layer_lock_on.png");
-    m_bmp_lock_off     = create_scaled_bitmap(this, "one_layer_lock_off.png");
-    m_bmp_unlock_on    = create_scaled_bitmap(this, "one_layer_unlock_on.png");
-    m_bmp_unlock_off   = create_scaled_bitmap(this, "one_layer_unlock_off.png");
-
+    m_bmp_lock_on      = ScalableBitmap(this, "one_layer_lock_on.png");
+    m_bmp_lock_off     = ScalableBitmap(this, "one_layer_lock_off.png");
+    m_bmp_unlock_on    = ScalableBitmap(this, "one_layer_unlock_on.png");
+    m_bmp_unlock_off   = ScalableBitmap(this, "one_layer_unlock_off.png");
 
 #ifdef __WXMSW__
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 #endif // __WXMSW__
-    SetBitmap(m_bmp_unlock_on);
-    SetBitmapDisabled(m_bmp_lock_on);
+    SetBitmap(m_bmp_unlock_on.bmp());
+    SetBitmapDisabled(m_bmp_lock_on.bmp());
 
     //button events
-    Bind(wxEVT_BUTTON,          &PrusaLockButton::OnButton, this);
-    Bind(wxEVT_ENTER_WINDOW,    &PrusaLockButton::OnEnterBtn, this);
-    Bind(wxEVT_LEAVE_WINDOW,    &PrusaLockButton::OnLeaveBtn, this);
+    Bind(wxEVT_BUTTON,          &LockButton::OnButton, this);
+    Bind(wxEVT_ENTER_WINDOW,    &LockButton::OnEnterBtn, this);
+    Bind(wxEVT_LEAVE_WINDOW,    &LockButton::OnLeaveBtn, this);
 }
 
-void PrusaLockButton::OnButton(wxCommandEvent& event)
+void LockButton::OnButton(wxCommandEvent& event)
 {
     m_is_pushed = !m_is_pushed;
     enter_button(true);
@@ -2369,18 +2262,26 @@ void PrusaLockButton::OnButton(wxCommandEvent& event)
     event.Skip();
 }
 
-void PrusaLockButton::SetLock(bool lock)
+void LockButton::SetLock(bool lock)
 {
     m_is_pushed = lock;
     enter_button(true);
 }
 
-void PrusaLockButton::enter_button(const bool enter)
+void LockButton::msw_rescale()
 {
-    wxBitmap* icon = m_is_pushed ?
-        enter ? &m_bmp_lock_off     : &m_bmp_lock_on :
-        enter ? &m_bmp_unlock_off   : &m_bmp_unlock_on;
-    SetBitmap(*icon);
+    m_bmp_lock_on   .msw_rescale();
+    m_bmp_lock_off  .msw_rescale();
+    m_bmp_unlock_on .msw_rescale();
+    m_bmp_unlock_off.msw_rescale();
+}
+
+void LockButton::enter_button(const bool enter)
+{
+    const wxBitmap& icon = m_is_pushed ?
+        enter ? m_bmp_lock_off.bmp() : m_bmp_lock_on.bmp() :
+        enter ? m_bmp_unlock_off.bmp() : m_bmp_unlock_on.bmp();
+    SetBitmap(icon);
 
     Refresh();
     Update();
@@ -2389,35 +2290,28 @@ void PrusaLockButton::enter_button(const bool enter)
 
 
 // ----------------------------------------------------------------------------
-// PrusaModeButton
+// ModeButton
 // ----------------------------------------------------------------------------
 
-PrusaModeButton::PrusaModeButton(   wxWindow *parent,
-                                    wxWindowID id,
-                                    const wxString& mode/* = wxEmptyString*/,
-                                    const wxBitmap& bmp_on/* = wxNullBitmap*/,
-                                    const wxSize& size/* = wxDefaultSize*/,
-                                    const wxPoint& pos/* = wxDefaultPosition*/) :
-    wxButton(parent, id, mode, pos, size, /*wxBU_EXACTFIT | */wxNO_BORDER),
-    m_bmp_on(bmp_on)
+ModeButton::ModeButton( wxWindow *          parent,
+                        wxWindowID          id,
+                        const std::string&  icon_name   /* = ""*/,
+                        const wxString&     mode        /* = wxEmptyString*/,
+                        const wxSize&       size        /* = wxDefaultSize*/,
+                        const wxPoint&      pos         /* = wxDefaultPosition*/) :
+//     wxButton(parent, id, mode, pos, wxDefaultSize/*size*/, wxBU_EXACTFIT | wxNO_BORDER),
+    ScalableButton(parent, id, icon_name, mode, size, pos)
 {
-#ifdef __WXMSW__
-    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-#endif // __WXMSW__
-    m_bmp_off = create_scaled_bitmap(this, "mode_off_sq.png");
-
     m_tt_focused = wxString::Format(_(L("Switch to the %s mode")), mode);
     m_tt_selected = wxString::Format(_(L("Current mode is %s")), mode);
 
-    SetBitmap(m_bmp_on);
-
     //button events
-    Bind(wxEVT_BUTTON,          &PrusaModeButton::OnButton, this);
-    Bind(wxEVT_ENTER_WINDOW,    &PrusaModeButton::OnEnterBtn, this);
-    Bind(wxEVT_LEAVE_WINDOW,    &PrusaModeButton::OnLeaveBtn, this);
+    Bind(wxEVT_BUTTON,          &ModeButton::OnButton, this);
+    Bind(wxEVT_ENTER_WINDOW,    &ModeButton::OnEnterBtn, this);
+    Bind(wxEVT_LEAVE_WINDOW,    &ModeButton::OnLeaveBtn, this);
 }
 
-void PrusaModeButton::OnButton(wxCommandEvent& event)
+void ModeButton::OnButton(wxCommandEvent& event)
 {
     m_is_selected = true;
     focus_button(m_is_selected);
@@ -2425,18 +2319,18 @@ void PrusaModeButton::OnButton(wxCommandEvent& event)
     event.Skip();
 }
 
-void PrusaModeButton::SetState(const bool state)
+void ModeButton::SetState(const bool state)
 {
     m_is_selected = state;
     focus_button(m_is_selected);
     SetToolTip(state ? m_tt_selected : m_tt_focused);
 }
 
-void PrusaModeButton::focus_button(const bool focus)
+void ModeButton::focus_button(const bool focus)
 {
-//     const wxBitmap& bmp = focus ? m_bmp_on : m_bmp_off;
-//     SetBitmap(bmp);
-    const wxFont& new_font = focus ? Slic3r::GUI::wxGetApp().bold_font() : Slic3r::GUI::wxGetApp().small_font();
+    wxFont font = GetFont();
+    const wxFont& new_font = focus ? font.Bold() : font.GetBaseFont();
+
     SetFont(new_font);
 
     Refresh();
@@ -2445,35 +2339,35 @@ void PrusaModeButton::focus_button(const bool focus)
 
 
 // ----------------------------------------------------------------------------
-// PrusaModeSizer
+// ModeSizer
 // ----------------------------------------------------------------------------
 
-PrusaModeSizer::PrusaModeSizer(wxWindow *parent, int hgap/* = 10*/) :
+ModeSizer::ModeSizer(wxWindow *parent, int hgap/* = 10*/) :
     wxFlexGridSizer(3, 0, hgap)
 {
     SetFlexibleDirection(wxHORIZONTAL);
 
-    std::vector<std::pair<wxString, wxBitmap>> buttons = {
-        {_(L("Simple")),    create_scaled_bitmap(parent, "mode_simple_sq.png")},
-        {_(L("Advanced")),  create_scaled_bitmap(parent, "mode_middle_sq.png")},
-        {_(L("Expert")),    create_scaled_bitmap(parent, "mode_expert_sq.png")}
+    std::vector < std::pair < wxString, std::string >> buttons = {
+        {_(L("Simple")),    "mode_simple_sq.png"},
+        {_(L("Advanced")),  "mode_middle_sq.png"},
+        {_(L("Expert")),    "mode_expert_sq.png"}
     };
 
-    mode_btns.reserve(3);
+    m_mode_btns.reserve(3);
     for (const auto& button : buttons) {
-        int x, y;
-        parent->GetTextExtent(button.first, &x, &y, nullptr, nullptr, &Slic3r::GUI::wxGetApp().bold_font());
-        const wxSize size = wxSize(x + button.second.GetWidth() + Slic3r::GUI::wxGetApp().em_unit(), 
-                                   y + Slic3r::GUI::wxGetApp().em_unit());
-        mode_btns.push_back(new PrusaModeButton(parent, wxID_ANY, button.first, button.second, size));
+//         int x, y;
+//         parent->GetTextExtent(button.first, &x, &y, nullptr, nullptr, &Slic3r::GUI::wxGetApp().bold_font());
+//         const wxSize size = wxSize(x + button.second.GetWidth() + Slic3r::GUI::wxGetApp().em_unit(), 
+//                                    y + Slic3r::GUI::wxGetApp().em_unit());
+        m_mode_btns.push_back(new ModeButton(parent, wxID_ANY, button.second, button.first/*, size*/));
     }
 
-    for (auto btn : mode_btns)
+    for (auto btn : m_mode_btns)
     {
         btn->Bind(wxEVT_BUTTON, [btn, this](wxCommandEvent &event) {
             event.Skip();
             int mode_id = 0;
-            for (auto cur_btn : mode_btns) {
+            for (auto cur_btn : m_mode_btns) {
                 if (cur_btn == btn)
                     break;
                 else
@@ -2487,18 +2381,24 @@ PrusaModeSizer::PrusaModeSizer(wxWindow *parent, int hgap/* = 10*/) :
 
 }
 
-void PrusaModeSizer::SetMode(const int mode)
+void ModeSizer::SetMode(const int mode)
 {
-    for (int m = 0; m < mode_btns.size(); m++)
-        mode_btns[m]->SetState(m == mode);
+    for (int m = 0; m < m_mode_btns.size(); m++)
+        m_mode_btns[m]->SetState(m == mode);
 }
 
 
+void ModeSizer::msw_rescale()
+{
+    for (int m = 0; m < m_mode_btns.size(); m++)
+        m_mode_btns[m]->msw_rescale();
+}
+
 // ----------------------------------------------------------------------------
-// PrusaMenu
+// MenuWithSeparators
 // ----------------------------------------------------------------------------
 
-void PrusaMenu::DestroySeparators()
+void MenuWithSeparators::DestroySeparators()
 {
     if (m_separator_frst) {
         Destroy(m_separator_frst);
@@ -2511,10 +2411,89 @@ void PrusaMenu::DestroySeparators()
     }
 }
 
+void MenuWithSeparators::SetFirstSeparator()
+{
+    m_separator_frst = this->AppendSeparator();
+}
 
-// ************************************** EXPERIMENTS ***************************************
+void MenuWithSeparators::SetSecondSeparator()
+{
+    m_separator_scnd = this->AppendSeparator();
+}
+
+// ----------------------------------------------------------------------------
+// PrusaBitmap
+// ----------------------------------------------------------------------------
+ScalableBitmap::ScalableBitmap( wxWindow *parent, 
+                                const std::string& icon_name/* = ""*/,
+                                const int px_cnt/* = 16*/, 
+                                const bool is_horizontal/*  = false*/):
+    m_parent(parent), m_icon_name(icon_name),
+    m_px_cnt(px_cnt), m_is_horizontal(is_horizontal)
+{
+    m_bmp = create_scaled_bitmap(parent, icon_name, px_cnt, is_horizontal);
+}
+
+
+void ScalableBitmap::msw_rescale()
+{
+    m_bmp = create_scaled_bitmap(m_parent, m_icon_name, m_px_cnt, m_is_horizontal);
+}
+
+// ----------------------------------------------------------------------------
+// PrusaButton
+// ----------------------------------------------------------------------------
+
+ScalableButton::ScalableButton( wxWindow *          parent,
+                                wxWindowID          id,
+                                const std::string&  icon_name /*= ""*/,
+                                const wxString&     label /* = wxEmptyString*/,
+                                const wxSize&       size /* = wxDefaultSize*/,
+                                const wxPoint&      pos /* = wxDefaultPosition*/,
+                                long                style /*= wxBU_EXACTFIT | wxNO_BORDER*/) :
+    m_current_icon_name(icon_name),
+    m_parent(parent)
+{
+    Create(parent, id, label, pos, size, style);
+#ifdef __WXMSW__
+    if (style & wxNO_BORDER)
+        SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
+#endif // __WXMSW__
+ 
+    SetBitmap(create_scaled_bitmap(parent, icon_name));
+}
+
+
+ScalableButton::ScalableButton( wxWindow *          parent, 
+                                wxWindowID          id,
+                                const ScalableBitmap&  bitmap,
+                                const wxString&     label /*= wxEmptyString*/, 
+                                long                style /*= wxBU_EXACTFIT | wxNO_BORDER*/) :
+    m_current_icon_name(bitmap.name()),
+    m_parent(parent)
+{
+    Create(parent, id, label, wxDefaultPosition, wxDefaultSize, style);
+#ifdef __WXMSW__
+    if (style & wxNO_BORDER)
+        SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
+#endif // __WXMSW__
+
+    SetBitmap(bitmap.bmp());
+}
+
+void ScalableButton::SetBitmap_(const ScalableBitmap& bmp)
+{
+    SetBitmap(bmp.bmp());
+    m_current_icon_name = bmp.name();
+}
+
+void ScalableButton::msw_rescale()
+{
+    const wxBitmap bmp = create_scaled_bitmap(m_parent, m_current_icon_name);
+
+    SetBitmap(bmp);
+}
 
-// *****************************************************************************
 
 
 
diff --git a/src/slic3r/GUI/wxExtensions.hpp b/src/slic3r/GUI/wxExtensions.hpp
index b935448d9..7d63438c0 100644
--- a/src/slic3r/GUI/wxExtensions.hpp
+++ b/src/slic3r/GUI/wxExtensions.hpp
@@ -31,7 +31,9 @@ wxMenuItem* append_submenu(wxMenu* menu, wxMenu* sub_menu, int id, const wxStrin
 wxMenuItem* append_menu_radio_item(wxMenu* menu, int id, const wxString& string, const wxString& description, 
     std::function<void(wxCommandEvent& event)> cb, wxEvtHandler* event_handler);
 
-wxBitmap create_scaled_bitmap(wxWindow *win, const std::string& bmp_name, const int px_cnt=16, const bool is_horizontal = false);
+int em_unit(wxWindow* win);
+
+wxBitmap create_scaled_bitmap(wxWindow *win, const std::string& bmp_name, const int px_cnt = 16, const bool is_horizontal = false);
 
 class wxCheckListBoxComboPopup : public wxCheckListBox, public wxComboPopup
 {
@@ -94,91 +96,20 @@ public:
 };
 
 
-
-// ***  PrusaCollapsiblePane  *** 
 // ----------------------------------------------------------------------------
-class PrusaCollapsiblePane : public wxCollapsiblePane
+// DataViewBitmapText: helper class used by PrusaBitmapTextRenderer
+// ----------------------------------------------------------------------------
+
+class DataViewBitmapText : public wxObject
 {
 public:
-	PrusaCollapsiblePane() {}
-	PrusaCollapsiblePane(wxWindow *parent,
-		wxWindowID winid,
-		const wxString& label,
-		const wxPoint& pos = wxDefaultPosition,
-		const wxSize& size = wxDefaultSize,
-		long style = wxCP_DEFAULT_STYLE,
-		const wxValidator& val = wxDefaultValidator,
-		const wxString& name = wxCollapsiblePaneNameStr)
-	{
-		Create(parent, winid, label, pos, size, style, val, name);
-	}
-	~PrusaCollapsiblePane() {}
-
-	void OnStateChange(const wxSize& sz); //override/hide of OnStateChange from wxCollapsiblePane
-	virtual bool Show(bool show = true) override {
-		wxCollapsiblePane::Show(show);
-		OnStateChange(GetBestSize());
-		return true;
-	}
-};
-
-
-// ***  PrusaCollapsiblePaneMSW  ***  used only #ifdef __WXMSW__
-// ----------------------------------------------------------------------------
-#ifdef __WXMSW__
-class PrusaCollapsiblePaneMSW : public PrusaCollapsiblePane//wxCollapsiblePane
-{
-	wxButton*	m_pDisclosureTriangleButton = nullptr;
-	wxBitmap	m_bmp_close;
-	wxBitmap	m_bmp_open;
-	wxString    m_strLabel;
-public:
-	PrusaCollapsiblePaneMSW() {}
-	PrusaCollapsiblePaneMSW(	wxWindow *parent,
-							wxWindowID winid,
-							const wxString& label,
-							const wxPoint& pos = wxDefaultPosition,
-							const wxSize& size = wxDefaultSize,
-							long style = wxCP_DEFAULT_STYLE,
-							const wxValidator& val = wxDefaultValidator,
-							const wxString& name = wxCollapsiblePaneNameStr)
-	{
-		Create(parent, winid, label, pos, size, style, val, name);
-	}
-
-	~PrusaCollapsiblePaneMSW() {}
-
-	bool Create(wxWindow *parent,
-				wxWindowID id,
-				const wxString& label,
-				const wxPoint& pos,
-				const wxSize& size,
-				long style,
-				const wxValidator& val,
-				const wxString& name);
-
-	void UpdateBtnBmp();
-	void SetLabel(const wxString &label) override;
-	bool Layout() override;
-	void Collapse(bool collapse) override;
-};
-#endif //__WXMSW__
-
-// *****************************************************************************
-
-// ----------------------------------------------------------------------------
-// PrusaDataViewBitmapText: helper class used by PrusaBitmapTextRenderer
-// ----------------------------------------------------------------------------
-
-class PrusaDataViewBitmapText : public wxObject
-{
-public:
-    PrusaDataViewBitmapText(const wxString &text = wxEmptyString,
-        const wxBitmap& bmp = wxNullBitmap) :
-        m_text(text), m_bmp(bmp)
+    DataViewBitmapText( const wxString &text = wxEmptyString,
+                        const wxBitmap& bmp = wxNullBitmap) :
+        m_text(text), 
+        m_bmp(bmp)
     { }
 
-    PrusaDataViewBitmapText(const PrusaDataViewBitmapText &other)
+    DataViewBitmapText(const DataViewBitmapText &other)
         : wxObject(),
         m_text(other.m_text),
         m_bmp(other.m_bmp)
@@ -186,18 +117,18 @@ public:
 
     void SetText(const wxString &text)      { m_text = text; }
     wxString GetText() const                { return m_text; }
-    void SetBitmap(const wxBitmap &bmp)      { m_bmp = bmp; }
+    void SetBitmap(const wxBitmap &bmp)     { m_bmp = bmp; }
     const wxBitmap &GetBitmap() const       { return m_bmp; }
 
-    bool IsSameAs(const PrusaDataViewBitmapText& other) const {
+    bool IsSameAs(const DataViewBitmapText& other) const {
         return m_text == other.m_text && m_bmp.IsSameAs(other.m_bmp);
     }
 
-    bool operator==(const PrusaDataViewBitmapText& other) const {
+    bool operator==(const DataViewBitmapText& other) const {
         return IsSameAs(other);
     }
 
-    bool operator!=(const PrusaDataViewBitmapText& other) const {
+    bool operator!=(const DataViewBitmapText& other) const {
         return !IsSameAs(other);
     }
 
@@ -205,13 +136,13 @@ private:
     wxString    m_text;
     wxBitmap    m_bmp;
 
-    wxDECLARE_DYNAMIC_CLASS(PrusaDataViewBitmapText);
+    wxDECLARE_DYNAMIC_CLASS(DataViewBitmapText);
 };
-DECLARE_VARIANT_OBJECT(PrusaDataViewBitmapText)
+DECLARE_VARIANT_OBJECT(DataViewBitmapText)
 
 
 // ----------------------------------------------------------------------------
-// PrusaObjectDataViewModelNode: a node inside PrusaObjectDataViewModel
+// ObjectDataViewModelNode: a node inside PrusaObjectDataViewModel
 // ----------------------------------------------------------------------------
 
 enum ItemType {
@@ -223,56 +154,73 @@ enum ItemType {
     itSettings = 16
 };
 
-class PrusaObjectDataViewModelNode;
-WX_DEFINE_ARRAY_PTR(PrusaObjectDataViewModelNode*, MyObjectTreeModelNodePtrArray);
+class ObjectDataViewModelNode;
+WX_DEFINE_ARRAY_PTR(ObjectDataViewModelNode*, MyObjectTreeModelNodePtrArray);
 
-class PrusaObjectDataViewModelNode
+class ObjectDataViewModelNode
 {
-	PrusaObjectDataViewModelNode*	m_parent;
+	ObjectDataViewModelNode*	    m_parent;
 	MyObjectTreeModelNodePtrArray   m_children;
     wxBitmap                        m_empty_bmp;
     size_t                          m_volumes_cnt = 0;
     std::vector< std::string >      m_opt_categories;
+
+    wxString				        m_name;
+    wxBitmap&                       m_bmp = m_empty_bmp;
+    ItemType				        m_type;
+    int                             m_idx = -1;
+    bool					        m_container = false;
+    wxString				        m_extruder = "default";
+    wxBitmap				        m_action_icon;
+
+    std::string                     m_action_icon_name = "";
+    Slic3r::ModelVolumeType         m_volume_type;
+
 public:
-    PrusaObjectDataViewModelNode(const wxString &name, 
-                                 const wxString& extruder) {
-		m_parent	= NULL;
-		m_name		= name;
-		m_type		= itObject;
+    ObjectDataViewModelNode(const wxString &name, 
+                            const wxString& extruder):
+        m_parent(NULL),
+        m_name(name),
+        m_type(itObject),
+        m_extruder(extruder)
+    {
 #ifdef __WXGTK__
         // it's necessary on GTK because of control have to know if this item will be container
         // in another case you couldn't to add subitem for this item
         // it will be produce "segmentation fault"
         m_container = true;
 #endif  //__WXGTK__
-        m_extruder = extruder;
-		set_object_action_icon();
+
+        set_action_icon();
 	}
 
-	PrusaObjectDataViewModelNode(	PrusaObjectDataViewModelNode* parent,
-									const wxString& sub_obj_name, 
-									const wxBitmap& bmp, 
-                                    const wxString& extruder, 
-                                    const int idx = -1 ) {
-		m_parent	= parent;
-		m_name		= sub_obj_name;
-		m_bmp		= bmp;
-		m_type		= itVolume;
-        m_idx       = idx;
-        m_extruder = extruder;
+	ObjectDataViewModelNode(ObjectDataViewModelNode* parent,
+							const wxString& sub_obj_name, 
+							const wxBitmap& bmp, 
+                            const wxString& extruder, 
+                            const int idx = -1 ) :
+        m_parent	(parent),
+		m_name		(sub_obj_name),
+		m_type		(itVolume),
+        m_idx       (idx),
+        m_extruder  (extruder)
+    {
+        m_bmp = bmp;		
 #ifdef __WXGTK__
         // it's necessary on GTK because of control have to know if this item will be container
         // in another case you couldn't to add subitem for this item
         // it will be produce "segmentation fault"
         m_container = true;
 #endif  //__WXGTK__
-		set_part_action_icon();
+
+        set_action_icon();
     }
 
-    PrusaObjectDataViewModelNode(   PrusaObjectDataViewModelNode* parent, const ItemType type) :
-                                    m_parent(parent),
-                                    m_type(type),
-                                    m_extruder(wxEmptyString)
+    ObjectDataViewModelNode(ObjectDataViewModelNode* parent, 
+                            const ItemType type) :
+        m_parent(parent),
+        m_type(type),
+        m_extruder(wxEmptyString)
 	{
         if (type == itSettings) {
             m_name = "Settings to modified";
@@ -286,35 +234,28 @@ public:
         else if (type == itInstance) {
             m_idx = parent->GetChildCount();
             m_name = wxString::Format("Instance_%d", m_idx+1);
-            set_part_action_icon();
+
+            set_action_icon();
         }
 	}
 
-	~PrusaObjectDataViewModelNode()
+	~ObjectDataViewModelNode()
 	{
 		// free all our children nodes
 		size_t count = m_children.GetCount();
 		for (size_t i = 0; i < count; i++)
 		{
-			PrusaObjectDataViewModelNode *child = m_children[i];
+			ObjectDataViewModelNode *child = m_children[i];
 			delete child;
 		}
 	}
-	
-	wxString				m_name;
-    wxBitmap&               m_bmp = m_empty_bmp;
-    ItemType				m_type;
-    int                     m_idx = -1;
-	bool					m_container = false;
-	wxString				m_extruder = "default";
-	wxBitmap				m_action_icon;
 
 	bool IsContainer() const
 	{
 		return m_container;
 	}
 
-	PrusaObjectDataViewModelNode* GetParent()
+	ObjectDataViewModelNode* GetParent()
 	{
 		return m_parent;
 	}
@@ -322,17 +263,17 @@ public:
 	{
 		return m_children;
 	}
-	PrusaObjectDataViewModelNode* GetNthChild(unsigned int n)
+	ObjectDataViewModelNode* GetNthChild(unsigned int n)
 	{
 		return m_children.Item(n);
 	}
-	void Insert(PrusaObjectDataViewModelNode* child, unsigned int n)
+	void Insert(ObjectDataViewModelNode* child, unsigned int n)
 	{
 		if (!m_container)
 			m_container = true;
 		m_children.Insert(child, n);
 	}
-	void Append(PrusaObjectDataViewModelNode* child)
+	void Append(ObjectDataViewModelNode* child)
 	{
 		if (!m_container)
 			m_container = true;
@@ -362,7 +303,7 @@ public:
 		switch (col)
 		{
 		case 0:{
-            PrusaDataViewBitmapText data;
+            DataViewBitmapText data;
 			data << variant;
             m_bmp = data.GetBitmap();
 			m_name = data.GetText();
@@ -400,7 +341,7 @@ public:
 	}
 
 	// use this function only for childrens
-	void AssignAllVal(PrusaObjectDataViewModelNode& from_node)
+	void AssignAllVal(ObjectDataViewModelNode& from_node)
 	{
 		// ! Don't overwrite other values because of equality of this values for all children --
 		m_name = from_node.m_name;
@@ -416,8 +357,8 @@ public:
 			scnd_id < 0 || scnd_id >= GetChildCount())
 			return false;
 
-		PrusaObjectDataViewModelNode new_scnd = *GetNthChild(frst_id);
-		PrusaObjectDataViewModelNode new_frst = *GetNthChild(scnd_id);
+		ObjectDataViewModelNode new_scnd = *GetNthChild(frst_id);
+		ObjectDataViewModelNode new_frst = *GetNthChild(scnd_id);
 
         new_scnd.m_idx = m_children.Item(scnd_id)->m_idx;
         new_frst.m_idx = m_children.Item(frst_id)->m_idx;
@@ -428,37 +369,40 @@ public:
 	}
 
 	// Set action icons for node
-	void set_object_action_icon();
-	void set_part_action_icon();
-    bool update_settings_digest(const std::vector<std::string>& categories);
+    void set_action_icon();
+
+    void    update_settings_digest_bitmaps();
+	bool    update_settings_digest(const std::vector<std::string>& categories);
+    int     volume_type() const { return int(m_volume_type); }
+    void    msw_rescale();
 private:
-    friend class PrusaObjectDataViewModel;
+    friend class ObjectDataViewModel;
 };
 
 // ----------------------------------------------------------------------------
-// PrusaObjectDataViewModel
+// ObjectDataViewModel
 // ----------------------------------------------------------------------------
 
 // custom message the model sends to associated control to notify a last volume deleted from the object:
 wxDECLARE_EVENT(wxCUSTOMEVT_LAST_VOLUME_IS_DELETED, wxCommandEvent);
 
-class PrusaObjectDataViewModel :public wxDataViewModel
+class ObjectDataViewModel :public wxDataViewModel
 {
-	std::vector<PrusaObjectDataViewModelNode*>  m_objects;
+	std::vector<ObjectDataViewModelNode*>       m_objects;
     std::vector<wxBitmap*>                      m_volume_bmps;
 
     wxDataViewCtrl*                             m_ctrl{ nullptr };
 
 public:
-    PrusaObjectDataViewModel();
-    ~PrusaObjectDataViewModel();
+    ObjectDataViewModel();
+    ~ObjectDataViewModel();
 
 	wxDataViewItem Add(const wxString &name, const int extruder);
-    wxDataViewItem AddVolumeChild(const wxDataViewItem &parent_item,
-        const wxString &name,
-        const Slic3r::ModelVolumeType volume_type,
-        const int extruder = 0,
-        const bool create_frst_child = true);
+    wxDataViewItem AddVolumeChild(  const wxDataViewItem &parent_item,
+                                    const wxString &name,
+                                    const Slic3r::ModelVolumeType volume_type,
+                                    const int extruder = 0,
+                                    const bool create_frst_child = true);
     wxDataViewItem AddSettingsChild(const wxDataViewItem &parent_item);
     wxDataViewItem AddInstanceChild(const wxDataViewItem &parent_item, size_t num);
 	wxDataViewItem Delete(const wxDataViewItem &item);
@@ -470,76 +414,82 @@ public:
 	wxDataViewItem GetItemById(int obj_idx);
 	wxDataViewItem GetItemByVolumeId(int obj_idx, int volume_idx);
 	wxDataViewItem GetItemByInstanceId(int obj_idx, int inst_idx);
-	int GetIdByItem(const wxDataViewItem& item) const;
-    int GetIdByItemAndType(const wxDataViewItem& item, const ItemType type) const;
-    int GetObjectIdByItem(const wxDataViewItem& item) const;
-    int GetVolumeIdByItem(const wxDataViewItem& item) const;
-    int GetInstanceIdByItem(const wxDataViewItem& item) const;
+	int  GetIdByItem(const wxDataViewItem& item) const;
+    int  GetIdByItemAndType(const wxDataViewItem& item, const ItemType type) const;
+    int  GetObjectIdByItem(const wxDataViewItem& item) const;
+    int  GetVolumeIdByItem(const wxDataViewItem& item) const;
+    int  GetInstanceIdByItem(const wxDataViewItem& item) const;
     void GetItemInfo(const wxDataViewItem& item, ItemType& type, int& obj_idx, int& idx);
-    int GetRowByItem(const wxDataViewItem& item) const;
+    int  GetRowByItem(const wxDataViewItem& item) const;
     bool IsEmpty() { return m_objects.empty(); }
 
 	// helper method for wxLog
 
-	wxString GetName(const wxDataViewItem &item) const;
-    wxBitmap& GetBitmap(const wxDataViewItem &item) const;
+	wxString    GetName(const wxDataViewItem &item) const;
+    wxBitmap&   GetBitmap(const wxDataViewItem &item) const;
 
 	// helper methods to change the model
 
-	virtual unsigned int GetColumnCount() const override { return 3;}
-	virtual wxString GetColumnType(unsigned int col) const override{ return wxT("string"); }
+	virtual unsigned int    GetColumnCount() const override { return 3;}
+	virtual wxString        GetColumnType(unsigned int col) const override{ return wxT("string"); }
 
-	virtual void GetValue(wxVariant &variant,
-		const wxDataViewItem &item, unsigned int col) const override;
-	virtual bool SetValue(const wxVariant &variant,
-		const wxDataViewItem &item, unsigned int col) override;
-	bool SetValue(const wxVariant &variant, const int item_idx, unsigned int col);
+	virtual void GetValue(  wxVariant &variant,
+		                    const wxDataViewItem &item, 
+                            unsigned int col) const override;
+	virtual bool SetValue(  const wxVariant &variant,
+		                    const wxDataViewItem &item, 
+                            unsigned int col) override;
+	bool SetValue(  const wxVariant &variant, 
+                    const int item_idx, 
+                    unsigned int col);
 
-// 	wxDataViewItem MoveChildUp(const wxDataViewItem &item);
-// 	wxDataViewItem MoveChildDown(const wxDataViewItem &item);
     // For parent move child from cur_volume_id place to new_volume_id 
     // Remaining items will moved up/down accordingly
-    wxDataViewItem ReorganizeChildren(int cur_volume_id, 
-                                      int new_volume_id,
-                                      const wxDataViewItem &parent);
+    wxDataViewItem  ReorganizeChildren( const int cur_volume_id, 
+                                        const int new_volume_id,
+                                        const wxDataViewItem &parent);
 
-	virtual bool IsEnabled(const wxDataViewItem &item, unsigned int col) const override;
+	virtual bool    IsEnabled(const wxDataViewItem &item, unsigned int col) const override;
 
-	virtual wxDataViewItem GetParent(const wxDataViewItem &item) const override;
+	virtual wxDataViewItem  GetParent(const wxDataViewItem &item) const override;
     // get object item
-    wxDataViewItem GetTopParent(const wxDataViewItem &item) const;
-	virtual bool IsContainer(const wxDataViewItem &item) const override;
-	virtual unsigned int GetChildren(const wxDataViewItem &parent,
-		wxDataViewItemArray &array) const override;
+    wxDataViewItem          GetTopParent(const wxDataViewItem &item) const;
+	virtual bool            IsContainer(const wxDataViewItem &item) const override;
+	virtual unsigned int    GetChildren(const wxDataViewItem &parent,
+		                                wxDataViewItemArray &array) const override;
     void GetAllChildren(const wxDataViewItem &parent,wxDataViewItemArray &array) const;
 	// Is the container just a header or an item with all columns
 	// In our case it is an item with all columns 
-	virtual bool HasContainerColumns(const wxDataViewItem& WXUNUSED(item)) const override {	return true; }
+	virtual bool    HasContainerColumns(const wxDataViewItem& WXUNUSED(item)) const override {	return true; }
 
-    ItemType GetItemType(const wxDataViewItem &item) const ;
-    wxDataViewItem    GetItemByType(const wxDataViewItem &parent_item, ItemType type) const;
-    wxDataViewItem    GetSettingsItem(const wxDataViewItem &item) const;
-    wxDataViewItem    GetInstanceRootItem(const wxDataViewItem &item) const;
+    ItemType        GetItemType(const wxDataViewItem &item) const ;
+    wxDataViewItem  GetItemByType(  const wxDataViewItem &parent_item, 
+                                    ItemType type) const;
+    wxDataViewItem  GetSettingsItem(const wxDataViewItem &item) const;
+    wxDataViewItem  GetInstanceRootItem(const wxDataViewItem &item) const;
     bool    IsSettingsItem(const wxDataViewItem &item) const;
-    void    UpdateSettingsDigest(const wxDataViewItem &item, const std::vector<std::string>& categories);
+    void    UpdateSettingsDigest(   const wxDataViewItem &item, 
+                                    const std::vector<std::string>& categories);
 
     void    SetVolumeBitmaps(const std::vector<wxBitmap*>& volume_bmps) { m_volume_bmps = volume_bmps; }
     void    SetVolumeType(const wxDataViewItem &item, const Slic3r::ModelVolumeType type);
 
     void    SetAssociatedControl(wxDataViewCtrl* ctrl) { m_ctrl = ctrl; }
+    // Rescale bitmaps for existing Items
+    void    Rescale();
 };
 
 // ----------------------------------------------------------------------------
-// PrusaBitmapTextRenderer
+// BitmapTextRenderer
 // ----------------------------------------------------------------------------
 #if ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
-class PrusaBitmapTextRenderer : public wxDataViewRenderer
+class BitmapTextRenderer : public wxDataViewRenderer
 #else
-class PrusaBitmapTextRenderer : public wxDataViewCustomRenderer
+class BitmapTextRenderer : public wxDataViewCustomRenderer
 #endif //ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
 {
 public:
-    PrusaBitmapTextRenderer(wxDataViewCellMode mode =
+    BitmapTextRenderer(wxDataViewCellMode mode =
 #ifdef __WXOSX__
                                                         wxDATAVIEW_CELL_INERT
 #else
@@ -550,7 +500,7 @@ public:
 #if ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
                             );
 #else
-                            ) : wxDataViewCustomRenderer(wxT("PrusaDataViewBitmapText"), mode, align) {}
+                            ) : wxDataViewCustomRenderer(wxT("DataViewBitmapText"), mode, align) {}
 #endif //ENABLE_NONCUSTOM_DATA_VIEW_RENDERING
 
     bool SetValue(const wxVariant &value);
@@ -578,7 +528,7 @@ public:
     bool        WasCanceled() const { return m_was_unusable_symbol; }
 
 private:
-    PrusaDataViewBitmapText m_value;
+    DataViewBitmapText m_value;
     bool                    m_was_unusable_symbol {false};
 };
 
@@ -676,7 +626,37 @@ private:
 
 
 // ----------------------------------------------------------------------------
-// PrusaDoubleSlider
+// ScalableBitmap
+// ----------------------------------------------------------------------------
+
+class ScalableBitmap
+{
+public:
+    ScalableBitmap() {};
+    ScalableBitmap( wxWindow *parent, 
+                    const std::string& icon_name = "",
+                    const int px_cnt = 16,
+                    const bool is_horizontal = false);
+
+    ~ScalableBitmap() {}
+
+    void                msw_rescale();
+
+    const wxBitmap&     bmp() const { return m_bmp; }
+    wxBitmap&           bmp()       { return m_bmp; }
+    const std::string&  name() const{ return m_icon_name; }
+
+private:
+    wxWindow*       m_parent{ nullptr };
+    wxBitmap        m_bmp = wxBitmap();
+    std::string     m_icon_name = "";
+    int             m_px_cnt {16};
+    bool            m_is_horizontal {false};
+};
+
+
+// ----------------------------------------------------------------------------
+// DoubleSlider
 // ----------------------------------------------------------------------------
 
 // custom message the slider sends to its parent to notify a tick-change:
@@ -693,10 +673,10 @@ enum TicksAction{
     taDel
 };
 
-class PrusaDoubleSlider : public wxControl
+class DoubleSlider : public wxControl
 {
 public:
-    PrusaDoubleSlider(
+    DoubleSlider(
         wxWindow *parent,
         wxWindowID id,
         int lowerValue, 
@@ -708,7 +688,9 @@ public:
         long style = wxSL_VERTICAL,
         const wxValidator& val = wxDefaultValidator,
         const wxString& name = wxEmptyString);
-    ~PrusaDoubleSlider() {}
+    ~DoubleSlider() {}
+
+    void    msw_rescale();
 
     int GetMinValue() const { return m_min_value; }
     int GetMaxValue() const { return m_max_value; }
@@ -717,6 +699,7 @@ public:
     int GetLowerValue() const { return m_lower_value; }
     int GetHigherValue() const { return m_higher_value; }
     int GetActiveValue() const;
+    wxSize get_min_size() const ;
     double GetLowerValueD()  { return get_double_value(ssLower); }
     double GetHigherValueD() { return get_double_value(ssHigher); }
     wxSize DoGetBestSize() const override;
@@ -801,16 +784,16 @@ private:
     int         m_max_value;
     int         m_lower_value;
     int         m_higher_value;
-    wxBitmap    m_bmp_thumb_higher;
-    wxBitmap    m_bmp_thumb_lower;
-    wxBitmap    m_bmp_add_tick_on;
-    wxBitmap    m_bmp_add_tick_off;
-    wxBitmap    m_bmp_del_tick_on;
-    wxBitmap    m_bmp_del_tick_off;
-    wxBitmap    m_bmp_one_layer_lock_on;
-    wxBitmap    m_bmp_one_layer_lock_off;
-    wxBitmap    m_bmp_one_layer_unlock_on;
-    wxBitmap    m_bmp_one_layer_unlock_off;
+    ScalableBitmap    m_bmp_thumb_higher;
+    ScalableBitmap    m_bmp_thumb_lower;
+    ScalableBitmap    m_bmp_add_tick_on;
+    ScalableBitmap    m_bmp_add_tick_off;
+    ScalableBitmap    m_bmp_del_tick_on;
+    ScalableBitmap    m_bmp_del_tick_off;
+    ScalableBitmap    m_bmp_one_layer_lock_on;
+    ScalableBitmap    m_bmp_one_layer_lock_off;
+    ScalableBitmap    m_bmp_one_layer_unlock_on;
+    ScalableBitmap    m_bmp_one_layer_unlock_off;
     SelectedSlider  m_selection;
     bool        m_is_left_down = false;
     bool        m_is_right_down = false;
@@ -841,26 +824,26 @@ private:
     wxPen   GREY_PEN;
     wxPen   LIGHT_GREY_PEN;
 
-    std::vector<wxPen*> line_pens;
-    std::vector<wxPen*> segm_pens;
+    std::vector<wxPen*> m_line_pens;
+    std::vector<wxPen*> m_segm_pens;
     std::set<int>       m_ticks;
     std::vector<std::pair<int,double>> m_values;
 };
 
 
 // ----------------------------------------------------------------------------
-// PrusaLockButton
+// LockButton
 // ----------------------------------------------------------------------------
 
-class PrusaLockButton : public wxButton
+class LockButton : public wxButton
 {
 public:
-    PrusaLockButton(
+    LockButton(
         wxWindow *parent,
         wxWindowID id,
         const wxPoint& pos = wxDefaultPosition,
         const wxSize& size = wxDefaultSize);
-    ~PrusaLockButton() {}
+    ~LockButton() {}
 
     void    OnButton(wxCommandEvent& event);
     void    OnEnterBtn(wxMouseEvent& event) { enter_button(true); event.Skip(); }
@@ -869,34 +852,72 @@ public:
     bool    IsLocked() const { return m_is_pushed; }
     void    SetLock(bool lock);
 
+    void    msw_rescale();
+
 protected:
     void    enter_button(const bool enter);
 
 private:
     bool        m_is_pushed = false;
 
-    wxBitmap    m_bmp_lock_on;
-    wxBitmap    m_bmp_lock_off;
-    wxBitmap    m_bmp_unlock_on;
-    wxBitmap    m_bmp_unlock_off;
+    ScalableBitmap    m_bmp_lock_on;
+    ScalableBitmap    m_bmp_lock_off;
+    ScalableBitmap    m_bmp_unlock_on;
+    ScalableBitmap    m_bmp_unlock_off;
 };
 
 
 // ----------------------------------------------------------------------------
-// PrusaModeButton
+// ScalableButton
 // ----------------------------------------------------------------------------
 
-class PrusaModeButton : public wxButton
+class ScalableButton : public wxButton
 {
 public:
-    PrusaModeButton(
-        wxWindow *parent,
-        wxWindowID id,
-        const wxString& mode = wxEmptyString,
-        const wxBitmap& bmp_on = wxNullBitmap,
-        const wxSize& size = wxDefaultSize,
-        const wxPoint& pos = wxDefaultPosition);
-    ~PrusaModeButton() {}
+    ScalableButton(){}
+    ScalableButton(
+        wxWindow *          parent,
+        wxWindowID          id,
+        const std::string&  icon_name = "",
+        const wxString&     label = wxEmptyString,
+        const wxSize&       size = wxDefaultSize,
+        const wxPoint&      pos = wxDefaultPosition,
+        long                style = wxBU_EXACTFIT | wxNO_BORDER);
+
+    ScalableButton(
+        wxWindow *          parent,
+        wxWindowID          id,
+        const ScalableBitmap&  bitmap,
+        const wxString&     label = wxEmptyString,
+        long                style = wxBU_EXACTFIT | wxNO_BORDER);
+
+    ~ScalableButton() {}
+
+    void SetBitmap_(const ScalableBitmap& bmp);
+
+    void    msw_rescale();
+
+private:
+    wxWindow*       m_parent;
+    std::string     m_current_icon_name = "";
+};
+
+
+// ----------------------------------------------------------------------------
+// ModeButton
+// ----------------------------------------------------------------------------
+
+class ModeButton : public ScalableButton
+{
+public:
+    ModeButton(
+        wxWindow*           parent,
+        wxWindowID          id,
+        const std::string&  icon_name = "",
+        const wxString&     mode = wxEmptyString,
+        const wxSize&       size = wxDefaultSize,
+        const wxPoint&      pos = wxDefaultPosition);
+    ~ModeButton() {}
 
     void    OnButton(wxCommandEvent& event);
     void    OnEnterBtn(wxMouseEvent& event) { focus_button(true); event.Skip(); }
@@ -910,8 +931,6 @@ protected:
 private:
     bool        m_is_selected = false;
 
-    wxBitmap    m_bmp_on;
-    wxBitmap    m_bmp_off;
     wxString    m_tt_selected;
     wxString    m_tt_focused;
 };
@@ -919,47 +938,49 @@ private:
 
 
 // ----------------------------------------------------------------------------
-// PrusaModeSizer
+// ModeSizer
 // ----------------------------------------------------------------------------
 
-class PrusaModeSizer : public wxFlexGridSizer
+class ModeSizer : public wxFlexGridSizer
 {
 public:
-    PrusaModeSizer( wxWindow *parent, int hgap = 10);
-    ~PrusaModeSizer() {}
+    ModeSizer( wxWindow *parent, int hgap = 10);
+    ~ModeSizer() {}
 
     void SetMode(const /*ConfigOptionMode*/int mode);
 
+    void msw_rescale();
+
 private:
-    std::vector<PrusaModeButton*> mode_btns;
+    std::vector<ModeButton*> m_mode_btns;
 };
 
 
 
 // ----------------------------------------------------------------------------
-// PrusaMenu
+// MenuWithSeparators
 // ----------------------------------------------------------------------------
 
-class PrusaMenu : public wxMenu
+class MenuWithSeparators : public wxMenu
 {
 public:
-    PrusaMenu(const wxString& title, long style = 0)
+    MenuWithSeparators(const wxString& title, long style = 0)
         : wxMenu(title, style) {}
 
-    PrusaMenu(long style = 0)
+    MenuWithSeparators(long style = 0)
         : wxMenu(style) {}
 
-    ~PrusaMenu() {}
+    ~MenuWithSeparators() {}
 
     void DestroySeparators();
+    void SetFirstSeparator();
+    void SetSecondSeparator();
 
+private:
     wxMenuItem* m_separator_frst { nullptr };    // use like separator before settings item
     wxMenuItem* m_separator_scnd { nullptr };   // use like separator between settings items
 };
 
 
-// ******************************* EXPERIMENTS **********************************************
-// ******************************************************************************************
-
 
 #endif // slic3r_GUI_wxExtensions_hpp_