diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 1d4a53fd9..e03df09bb 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1322,7 +1322,7 @@ bool GUI_App::on_init_inner()
     if (!delayed_error_load_presets.empty())
         show_error(nullptr, delayed_error_load_presets);
 
-    mainframe = new MainFrame();
+    mainframe = new MainFrame(app_config->has("font_size") ? atoi(app_config->get("font_size").c_str()) : -1);
     // hide settings tabs after first Layout
     if (is_editor())
         mainframe->select_tab(size_t(0));
@@ -1810,7 +1810,7 @@ void GUI_App::recreate_GUI(const wxString& msg_name)
     dlg.Update(10, _L("Recreating") + dots);
 
     MainFrame *old_main_frame = mainframe;
-    mainframe = new MainFrame();
+    mainframe = new MainFrame(app_config->has("font_size") ? atoi(app_config->get("font_size").c_str()) : -1);
     if (is_editor())
         // hide settings tabs after first Layout
         mainframe->select_tab(size_t(0));
diff --git a/src/slic3r/GUI/GUI_Utils.hpp b/src/slic3r/GUI/GUI_Utils.hpp
index 55ca43248..624e7e1a3 100644
--- a/src/slic3r/GUI/GUI_Utils.hpp
+++ b/src/slic3r/GUI/GUI_Utils.hpp
@@ -82,7 +82,7 @@ template<class P> class DPIAware : public P
 {
 public:
     DPIAware(wxWindow *parent, wxWindowID id, const wxString &title, const wxPoint &pos=wxDefaultPosition,
-        const wxSize &size=wxDefaultSize, long style=wxDEFAULT_FRAME_STYLE, const wxString &name=wxFrameNameStr)
+        const wxSize &size=wxDefaultSize, long style=wxDEFAULT_FRAME_STYLE, const wxString &name= wxFrameNameStr, const int font_point_size = -1)
         : P(parent, id, title, pos, size, style, name)
     {
         int dpi = get_dpi_for_window(this);
@@ -90,6 +90,9 @@ public:
         m_prev_scale_factor = m_scale_factor;
 		m_normal_font = get_default_font_for_dpi(this, dpi);
 
+        if (font_point_size > 0)
+            m_normal_font.SetPointSize(font_point_size);
+
         /* Because of default window font is a primary display font, 
          * We should set correct font for window before getting em_unit value.
          */
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 0c7805db8..4c9e8332a 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -122,8 +122,8 @@ static wxIcon main_frame_icon(GUI_App::EAppMode app_mode)
 #endif // _WIN32
 }
 
-MainFrame::MainFrame() :
-DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "mainframe"),
+MainFrame::MainFrame(const int font_point_size) :
+DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "mainframe", font_point_size),
     m_printhost_queue_dlg(new PrintHostQueueDialog(this))
     , m_recent_projects(9)
     , m_settings_dialog(this)
@@ -1540,6 +1540,7 @@ void MainFrame::init_menubar_as_editor()
     // assign menubar to frame after appending items, otherwise special items
     // will not be handled correctly
     m_menubar = new wxMenuBar();
+    m_menubar->SetFont(this->normal_font());
     m_menubar->Append(fileMenu, _L("&File"));
     if (editMenu) m_menubar->Append(editMenu, _L("&Edit"));
     m_menubar->Append(windowMenu, _L("&Window"));
@@ -2237,7 +2238,7 @@ std::string MainFrame::get_dir_name(const wxString &full_name) const
 // ----------------------------------------------------------------------------
 
 SettingsDialog::SettingsDialog(MainFrame* mainframe)
-:DPIFrame(NULL, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _L("Settings"), wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "settings_dialog"),
+:DPIFrame(NULL, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _L("Settings"), wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "settings_dialog", mainframe->normal_font().GetPointSize()),
 //: DPIDialog(mainframe, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _L("Settings"), wxDefaultPosition, wxDefaultSize,
 //        wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER | wxMINIMIZE_BOX | wxMAXIMIZE_BOX, "settings_dialog"),
     m_main_frame(mainframe)
diff --git a/src/slic3r/GUI/MainFrame.hpp b/src/slic3r/GUI/MainFrame.hpp
index 78ec13f64..c9fa601e1 100644
--- a/src/slic3r/GUI/MainFrame.hpp
+++ b/src/slic3r/GUI/MainFrame.hpp
@@ -139,7 +139,7 @@ protected:
     virtual void on_sys_color_changed() override;
 
 public:
-    MainFrame();
+    MainFrame(const int font_point_size);
     ~MainFrame() = default;
 
     void update_layout();
diff --git a/src/slic3r/GUI/MsgDialog.cpp b/src/slic3r/GUI/MsgDialog.cpp
index 43e13841c..cce159903 100644
--- a/src/slic3r/GUI/MsgDialog.cpp
+++ b/src/slic3r/GUI/MsgDialog.cpp
@@ -136,7 +136,7 @@ static void add_msg_content(wxWindow* parent, wxBoxSizer* content_sizer, wxStrin
         msg_lines++;
     }
 
-    wxFont      font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+    wxFont      font = wxGetApp().normal_font();//wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
     wxFont      monospace = wxGetApp().code_font();
     wxColour    text_clr = wxGetApp().get_label_clr_default();
     wxColour    bgr_clr = parent->GetBackgroundColour();
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index 492e3fc37..69b6fb5fe 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -4,6 +4,7 @@
 #include "Plater.hpp"
 #include "MsgDialog.hpp"
 #include "I18N.hpp"
+#include "format.hpp"
 #include "libslic3r/AppConfig.hpp"
 #include <wx/notebook.h>
 #include "Notebook.hpp"
@@ -549,6 +550,7 @@ void PreferencesDialog::build()
 		create_settings_mode_widget();
 		create_settings_text_color_widget();
 		create_settings_mode_color_widget();
+//		create_settings_font_widget();
 
 		m_optgroup_other = create_options_tab(_L("Other"), tabs);
 		m_optgroup_other->m_on_change = [this](t_config_option_key opt_key, boost::any value) {
@@ -580,6 +582,7 @@ void PreferencesDialog::build()
 		activate_options_tab(m_optgroup_other);
 
 		create_downloader_path_sizer();
+		create_settings_font_widget();
 
 #if ENABLE_ENVIRONMENT_MAP
 		// Add "Render" tab
@@ -694,7 +697,7 @@ void PreferencesDialog::accept(wxEvent&)
 
 	bool update_filament_sidebar = (m_values.find("no_templates") != m_values.end());
 
-	std::vector<std::string> options_to_recreate_GUI = { "no_defaults", "tabs_as_menu", "sys_menu_enabled" };
+	std::vector<std::string> options_to_recreate_GUI = { "no_defaults", "tabs_as_menu", "sys_menu_enabled", "font_size" };
 
 	for (const std::string& option : options_to_recreate_GUI) {
 		if (m_values.find(option) != m_values.end()) {
@@ -943,7 +946,6 @@ void PreferencesDialog::create_icon_size_slider()
 void PreferencesDialog::create_settings_mode_widget()
 {
 	wxWindow* parent = m_optgroup_gui->parent();
-	wxGetApp().UpdateDarkUI(parent);
 
 	wxString title = L("Layout Options");
     wxStaticBox* stb = new wxStaticBox(parent, wxID_ANY, _(title));
@@ -1045,6 +1047,74 @@ void PreferencesDialog::create_settings_mode_color_widget()
 	append_preferences_option_to_searcher(m_optgroup_gui, opt_key, title);
 }
 
+void PreferencesDialog::create_settings_font_widget()
+{
+	wxWindow* parent = m_optgroup_other->parent();
+	wxGetApp().UpdateDarkUI(parent);
+
+	const wxString title = L("Application font size");
+	wxStaticBox* stb = new wxStaticBox(parent, wxID_ANY, _(title));
+	if (!wxOSX) stb->SetBackgroundStyle(wxBG_STYLE_PAINT);
+
+	const std::string opt_key = "font_size";
+	m_blinkers[opt_key] = new BlinkingBitmap(parent);
+
+	wxSizer* stb_sizer = new wxStaticBoxSizer(stb, wxHORIZONTAL);
+
+	wxStaticText* font_example = new wxStaticText(parent, wxID_ANY, "Application text");
+    int val = wxGetApp().normal_font().GetPointSize();
+	wxSpinCtrl* size_sc = new wxSpinCtrl(parent, wxID_ANY, format_wxstr("%1%", val), wxDefaultPosition, wxSize(15*em_unit(), -1), wxTE_PROCESS_ENTER | wxSP_ARROW_KEYS
+#ifdef _WIN32
+		| wxBORDER_SIMPLE
+#endif 
+	, 8, 20);
+	wxGetApp().UpdateDarkUI(size_sc);
+
+	auto apply_font = [this, font_example, opt_key](const int val, const wxFont& font) {
+		font_example->SetFont(font);
+		m_values[opt_key] = format("%1%", val);
+		refresh_og(m_optgroup_other);
+	};
+
+	auto change_value = [size_sc, apply_font](wxCommandEvent& evt) {
+		const int val = size_sc->GetValue();
+		wxFont font = wxGetApp().normal_font();
+		font.SetPointSize(val);
+
+		apply_font(val, font);
+	};
+    size_sc->Bind(wxEVT_SPINCTRL, change_value);
+	size_sc->Bind(wxEVT_TEXT_ENTER, change_value);
+
+	auto revert_btn = new ScalableButton(parent, wxID_ANY, "undo");
+	revert_btn->SetToolTip(_L("Revert font to default"));
+	revert_btn->Bind(wxEVT_BUTTON, [size_sc, apply_font](wxEvent& event) {
+		wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+		const int val = font.GetPointSize();
+	    size_sc->SetValue(val);
+		apply_font(val, font);
+	});
+	parent->Bind(wxEVT_UPDATE_UI, [size_sc](wxUpdateUIEvent& evt) {
+		const int def_size = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).GetPointSize();
+		evt.Enable(def_size != size_sc->GetValue());
+	}, revert_btn->GetId());
+
+    stb_sizer->Add(new wxStaticText(parent, wxID_ANY, _L("Font size") + ":"), 0, wxALIGN_CENTER_VERTICAL | wxLEFT, em_unit());
+    stb_sizer->Add(size_sc, 0, wxALIGN_CENTER_VERTICAL | wxRIGHT | wxLEFT, em_unit());
+    stb_sizer->Add(revert_btn, 0, wxALIGN_CENTER_VERTICAL | wxRIGHT, em_unit());
+	wxBoxSizer* font_sizer = new wxBoxSizer(wxVERTICAL);
+	font_sizer->Add(font_example, 1, wxALIGN_CENTER_HORIZONTAL);
+    stb_sizer->Add(font_sizer, 1, wxALIGN_CENTER_VERTICAL);
+
+	auto sizer = new wxBoxSizer(wxHORIZONTAL);
+	sizer->Add(m_blinkers[opt_key], 0, wxRIGHT, 2);
+	sizer->Add(stb_sizer, 1, wxALIGN_CENTER_VERTICAL);
+
+	m_optgroup_other->sizer->Add(sizer, 1, wxEXPAND | wxTOP, em_unit());
+
+	append_preferences_option_to_searcer(m_optgroup_other, opt_key, title);
+}
+
 void PreferencesDialog::create_downloader_path_sizer()
 {
 	wxWindow* parent = m_optgroup_other->parent();
diff --git a/src/slic3r/GUI/Preferences.hpp b/src/slic3r/GUI/Preferences.hpp
index 4ae93f6f9..765447f89 100644
--- a/src/slic3r/GUI/Preferences.hpp
+++ b/src/slic3r/GUI/Preferences.hpp
@@ -91,10 +91,12 @@ protected:
     void layout();
 	void clear_cache();
 	void refresh_og(std::shared_ptr<ConfigOptionsGroup> og);
+	void refresh_og(ConfigOptionsGroup* og);
     void create_icon_size_slider();
     void create_settings_mode_widget();
     void create_settings_text_color_widget();
     void create_settings_mode_color_widget();
+    void create_settings_font_widget();
     void create_downloader_path_sizer();
 	void init_highlighter(const t_config_option_key& opt_key);
 	std::vector<ConfigOptionsGroup*> optgroups();
diff --git a/src/slic3r/GUI/SavePresetDialog.cpp b/src/slic3r/GUI/SavePresetDialog.cpp
index 09ae10207..a561a754e 100644
--- a/src/slic3r/GUI/SavePresetDialog.cpp
+++ b/src/slic3r/GUI/SavePresetDialog.cpp
@@ -311,11 +311,13 @@ SavePresetDialog::~SavePresetDialog()
 
 void SavePresetDialog::build(std::vector<Preset::Type> types, std::string suffix, bool template_filament)
 {
+    this->SetFont(wxGetApp().normal_font());
+
 #if defined(__WXMSW__)
     // ys_FIXME! temporary workaround for correct font scaling
     // Because of from wxWidgets 3.1.3 auto rescaling is implemented for the Fonts,
     // From the very beginning set dialog font to the wxSYS_DEFAULT_GUI_FONT
-    this->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
+//    this->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 #else
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 #endif // __WXMSW__
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 3fb7bf605..d31f48913 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -265,6 +265,7 @@ void Tab::create_preset_tab()
     // tree
     m_treectrl = new wxTreeCtrl(panel, wxID_ANY, wxDefaultPosition, wxSize(20 * m_em_unit, -1),
         wxTR_NO_BUTTONS | wxTR_HIDE_ROOT | wxTR_SINGLE | wxTR_NO_LINES | wxBORDER_SUNKEN | wxWANTS_CHARS);
+    m_treectrl->SetFont(wxGetApp().normal_font());
     m_left_sizer->Add(m_treectrl, 1, wxEXPAND);
     // Index of the last icon inserted into m_treectrl
     m_icon_count = -1;
diff --git a/src/slic3r/GUI/UnsavedChangesDialog.cpp b/src/slic3r/GUI/UnsavedChangesDialog.cpp
index ad702c1b3..5220b2115 100644
--- a/src/slic3r/GUI/UnsavedChangesDialog.cpp
+++ b/src/slic3r/GUI/UnsavedChangesDialog.cpp
@@ -837,7 +837,8 @@ void UnsavedChangesDialog::build(Preset::Type type, PresetCollection* dependent_
     // ys_FIXME! temporary workaround for correct font scaling
     // Because of from wxWidgets 3.1.3 auto rescaling is implemented for the Fonts,
     // From the very beginning set dialog font to the wxSYS_DEFAULT_GUI_FONT
-    this->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
+//    this->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
+    this->SetFont(wxGetApp().normal_font());
 #endif // __WXMSW__
 
     int border = 10;
@@ -850,7 +851,8 @@ void UnsavedChangesDialog::build(Preset::Type type, PresetCollection* dependent_
         add_new_value_column = false;
 
     m_action_line = new wxStaticText(this, wxID_ANY, "");
-    m_action_line->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold());
+//    m_action_line->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold());
+    m_action_line->SetFont(wxGetApp().bold_font());
 
     m_tree = new DiffViewCtrl(this, wxSize(em * (add_new_value_column ? 80 : 60), em * 30));
     m_tree->AppendToggleColumn_(L"\u2714"      , DiffModel::colToggle, wxLinux ? 9 : 6);
@@ -910,7 +912,8 @@ void UnsavedChangesDialog::build(Preset::Type type, PresetCollection* dependent_
     cancel_btn->Bind(wxEVT_BUTTON, [this](wxEvent&) { this->EndModal(wxID_CANCEL); });
 
     m_info_line = new wxStaticText(this, wxID_ANY, "");
-    m_info_line->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold());
+//    m_info_line->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold());
+    m_info_line->SetFont(wxGetApp().bold_font());
     m_info_line->Hide();
 
     if (!m_app_config_key.empty()) {
@@ -1362,6 +1365,7 @@ FullCompareDialog::FullCompareDialog(const wxString& option_name, const wxString
     : wxDialog(nullptr, wxID_ANY, option_name, wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
     wxGetApp().UpdateDarkUI(this);
+    this->SetFont(wxGetApp().normal_font());
 
     int border = 10;
     bool has_new_value_column = !new_value_header.IsEmpty();
@@ -1528,7 +1532,8 @@ void DiffPresetDialog::create_show_all_presets_chb()
 
 void DiffPresetDialog::create_info_lines()
 {
-    const wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold();
+//    const wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold();
+    const wxFont font = GetFont().Bold();
 
     m_top_info_line = new wxStaticText(this, wxID_ANY, _L("Select presets to compare"));
     m_top_info_line->SetFont(font);
@@ -1668,7 +1673,8 @@ DiffPresetDialog::DiffPresetDialog(MainFrame* mainframe)
     // ys_FIXME! temporary workaround for correct font scaling
     // Because of from wxWidgets 3.1.3 auto rescaling is implemented for the Fonts,
     // From the very beginning set dialog font to the wxSYS_DEFAULT_GUI_FONT
-    this->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
+//    this->SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
+    this->SetFont(mainframe->normal_font());
 #endif // __WXMSW__
 
     // Init bundles