New Layouts: There 3 mode of a layout of the settings tabpanel :

1. Old mode, as it was always.
2. New mode, when Settings Tabs are hidden on the Plater. Use "cog" icon for the switching to the settings tabs
3. Dlg mode, when Settings Tabs are extracted to the Settings dialog. Use "cog" icon for Show or Focus the Settings Dialog

The "Collapse sidebar" toolbar appearance is set in the Preferences.

src/slic3r/GUI/GLCanvas3D.cpp

@@ -4362,6 +4362,9 @@ void GLCanvas3D::update_ui_from_settings()
         _refresh_if_shown_on_screen();
     }
 #endif
+
+    bool enable_collapse = wxGetApp().app_config->get("show_collapse_button") == "1";
+    enable_collapse_toolbar(enable_collapse);
 }
 
 
@@ -5062,10 +5065,23 @@ bool GLCanvas3D::_init_main_toolbar()
     if (!m_main_toolbar.add_separator())
         return false;
 
+    item.name = "settings";
+    item.icon_filename = "cog.svg";
+    item.tooltip = _utf8(L("Switch to Settings"));
+    item.sprite_id = 10;
+    item.enabling_callback    = GLToolbarItem::Default_Enabling_Callback;
+    item.visibility_callback  = [this]() { return wxGetApp().app_config->get("old_settings_layout_mode") != "1"; };
+    item.left.action_callback = [this]() { wxGetApp().mainframe->select_tab(); };
+    if (!m_main_toolbar.add_item(item))
+        return false;
+
+    if (!m_main_toolbar.add_separator())
+        return false;
+
     item.name = "layersediting";
     item.icon_filename = "layers_white.svg";
     item.tooltip = _utf8(L("Variable layer height"));
-    item.sprite_id = 10;
+    item.sprite_id = /*10*/11;
     item.left.toggable = true;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_LAYERSEDITING)); };
     item.visibility_callback = [this]()->bool
@@ -5087,7 +5103,7 @@ bool GLCanvas3D::_init_main_toolbar()
     item.name = "search";
     item.icon_filename = "search_.svg";
     item.tooltip = _utf8(L("Search")) + " [" + GUI::shortkey_ctrl_prefix() + "F]";
-    item.sprite_id = 11;
+    item.sprite_id = /*11*/12;
     item.left.render_callback = [this](float left, float right, float, float) {
         if (m_canvas != nullptr)
         {
@@ -5264,61 +5280,10 @@ bool GLCanvas3D::_init_collapse_toolbar()
         wxGetApp().plater()->collapse_sidebar(!wxGetApp().plater()->is_sidebar_collapsed());
     };
 
-    if (!m_collapse_toolbar.add_item(item))
-        return false;
-
-    if (!m_collapse_toolbar.add_separator())
-        return false;
-
-    item.name = "print";
-    item.icon_filename = "cog.svg";
-    item.tooltip = _utf8(L("Switch to Print Settings")) + " [" + GUI::shortkey_ctrl_prefix() + "2]";
-    item.sprite_id = 1;
-    item.left.action_callback = [this]() { wxGetApp().mainframe->select_tab(/*0*/1); };
-
-    if (!m_collapse_toolbar.add_item(item))
-        return false;
-
-    item.name = "filament";
-    item.icon_filename = "spool.svg";
-    item.tooltip = _utf8(L("Switch to Filament Settings")) + " [" + GUI::shortkey_ctrl_prefix() + "3]";
-    item.sprite_id = 2;
-    item.left.action_callback = [this]() { wxGetApp().mainframe->select_tab(/*1*/2); };
-    item.visibility_callback  = [this]() { return wxGetApp().plater()->printer_technology() == ptFFF; };
-
-    if (!m_collapse_toolbar.add_item(item))
-        return false;
-
-    item.name = "printer";
-    item.icon_filename = "printer.svg";
-    item.tooltip = _utf8(L("Switch to Printer Settings")) + " [" + GUI::shortkey_ctrl_prefix() + "4]";
-    item.sprite_id = 3;
-    item.left.action_callback = [this]() { wxGetApp().mainframe->select_tab(/*2*/3); };
-
-    if (!m_collapse_toolbar.add_item(item))
-        return false;
-
-    item.name = "resin";
-    item.icon_filename = "resin.svg";
-    item.tooltip = _utf8(L("Switch to SLA Material Settings")) + " [" + GUI::shortkey_ctrl_prefix() + "3]";
-    item.sprite_id = 4;
-    item.left.action_callback = [this]() { wxGetApp().mainframe->select_tab(/*1*/2); };
-    item.visibility_callback  = [this]() { return m_process->current_printer_technology() == ptSLA; };
-
-    if (!m_collapse_toolbar.add_item(item))
-        return false;
-
-    item.name = "sla_printer";
-    item.icon_filename = "sla_printer.svg";
-    item.tooltip = _utf8(L("Switch to Printer Settings")) + " [" + GUI::shortkey_ctrl_prefix() + "4]";
-    item.sprite_id = 5;
-    item.left.action_callback = [this]() { wxGetApp().mainframe->select_tab(/*2*/3); };
-
     if (!m_collapse_toolbar.add_item(item))
         return false;
 
     return true;
-
 }
 
 bool GLCanvas3D::_set_current()

src/slic3r/GUI/GLToolbar.cpp

@@ -252,7 +252,7 @@ bool GLToolbar::is_enabled() const
 
 void GLToolbar::set_enabled(bool enable)
 {
-    m_enabled = true;
+    m_enabled = enable;//true; etFIXME
 }
 
 bool GLToolbar::add_item(const GLToolbarItem::Data& data)

src/slic3r/GUI/GUI_App.cpp

@@ -413,7 +413,8 @@ bool GUI_App::on_init_inner()
     if (wxImage::FindHandler(wxBITMAP_TYPE_PNG) == nullptr)
         wxImage::AddHandler(new wxPNGHandler());
     mainframe = new MainFrame();
-    mainframe->switch_to(true); // hide settings tabs after first Layout
+    // hide settings tabs after first Layout
+    mainframe->select_tab(0);
 
     sidebar().obj_list()->init_objects(); // propagate model objects to object list
 //     update_mode(); // !!! do that later
@@ -602,6 +603,8 @@ void GUI_App::recreate_GUI()
 
     MainFrame *old_main_frame = mainframe;
     mainframe = new MainFrame();
+    // hide settings tabs after first Layout
+    mainframe->select_tab(0);
     // Propagate model objects to object list.
     sidebar().obj_list()->init_objects();
     SetTopWindow(mainframe);

src/slic3r/GUI/MainFrame.cpp

@@ -90,10 +90,12 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_S
 
     // initialize layout
     auto sizer = new wxBoxSizer(wxVERTICAL);
-    if (m_plater)
+    if (m_plater && m_layout != slOld)
         sizer->Add(m_plater, 1, wxEXPAND);
-    if (m_tabpanel)
+
+    if (m_tabpanel && m_layout != slDlg)
         sizer->Add(m_tabpanel, 1, wxEXPAND);
+
     sizer->SetSizeHints(this);
     SetSizer(sizer);
     Fit();
@@ -289,12 +291,22 @@ void MainFrame::update_title()
 
 void MainFrame::init_tabpanel()
 {
-    // wxNB_NOPAGETHEME: Disable Windows Vista theme for the Notebook background. The theme performance is terrible on Windows 10
+    m_layout = wxGetApp().app_config->get("old_settings_layout_mode") == "1" ? slOld :
-    // with multiple high resolution displays connected.
+               wxGetApp().app_config->get("new_settings_layout_mode") == "1" ? slNew :
-    m_tabpanel = new wxNotebook(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNB_TOP | wxTAB_TRAVERSAL | wxNB_NOPAGETHEME);
+               wxGetApp().app_config->get("dlg_settings_layout_mode") == "1" ? slDlg : slOld;
+
+    if (m_layout == slDlg) {
+        m_settings_dialog = new SettingsDialog();
+        m_tabpanel = m_settings_dialog->get_tabpanel();
+    }
+    else {
+        // wxNB_NOPAGETHEME: Disable Windows Vista theme for the Notebook background. The theme performance is terrible on Windows 10
+        // with multiple high resolution displays connected.
+        m_tabpanel = new wxNotebook(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNB_TOP | wxTAB_TRAVERSAL | wxNB_NOPAGETHEME);
 #ifndef __WXOSX__ // Don't call SetFont under OSX to avoid name cutting in ObjectList
-    m_tabpanel->SetFont(Slic3r::GUI::wxGetApp().normal_font());
+        m_tabpanel->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 #endif
+    }
 
     m_tabpanel->Bind(wxEVT_NOTEBOOK_PAGE_CHANGED, [this](wxEvent&) {
         auto panel = m_tabpanel->GetCurrentPage();
@@ -307,17 +319,22 @@ void MainFrame::init_tabpanel()
             // On GTK, the wxEVT_NOTEBOOK_PAGE_CHANGED event is triggered
             // before the MainFrame is fully set up.
             static_cast<Tab*>(panel)->OnActivate();
+            m_last_selected_tab = m_tabpanel->GetSelection();
         }
         else
             select_tab(0);
     });
 
-//!    m_plater = new Slic3r::GUI::Plater(m_tabpanel, this);
+    if (m_layout == slOld) {
-    m_plater = new Plater(this, this);
+        m_plater = new Plater(m_tabpanel, this);
-
+        m_tabpanel->AddPage(m_plater, _L("Plater"));
+    }
+    else {
+        m_plater = new Plater(this, this);
+        if (m_layout == slNew)
+            m_tabpanel->AddPage(new wxPanel(m_tabpanel), _L("Plater")); // empty panel just for Plater tab
+    }
     wxGetApp().plater_ = m_plater;
-//    m_tabpanel->AddPage(m_plater, _(L("Plater")));
-    m_tabpanel->AddPage(new wxPanel(m_tabpanel), _L("Plater")); // empty panel just for Plater tab
 
     wxGetApp().obj_list()->create_popup_menus();
 
@@ -343,13 +360,6 @@ void MainFrame::init_tabpanel()
     }
 }
 
-void MainFrame::switch_to(bool plater)
-{
-    this->m_plater->Show(plater);
-    this->m_tabpanel->Show(!plater);
-    this->Layout();
-}
-
 void MainFrame::create_preset_tabs()
 {
     wxGetApp().update_label_colours_from_appconfig();
@@ -763,25 +773,21 @@ void MainFrame::init_menubar()
     // Window menu
     auto windowMenu = new wxMenu();
     {
-//!        size_t tab_offset = 0;
         if (m_plater) {
             append_menu_item(windowMenu, wxID_HIGHEST + 1, _(L("&Plater Tab")) + "\tCtrl+1", _(L("Show the plater")),
-                [this/*, tab_offset*/](wxCommandEvent&) { select_tab(/*(size_t)(-1)*/0); }, "plater", nullptr,
+                [this](wxCommandEvent&) { select_tab(0); }, "plater", nullptr,
                 [this]() {return true; }, this);
-//!            tab_offset += 1;
-//!        }
-//!        if (tab_offset > 0) {
             windowMenu->AppendSeparator();
         }
         append_menu_item(windowMenu, wxID_HIGHEST + 2, _(L("P&rint Settings Tab")) + "\tCtrl+2", _(L("Show the print settings")),
-            [this/*, tab_offset*/](wxCommandEvent&) { select_tab(/*tab_offset + 0*/1); }, "cog", nullptr,
+            [this/*, tab_offset*/](wxCommandEvent&) { select_tab(1); }, "cog", nullptr,
             [this]() {return true; }, this);
         wxMenuItem* item_material_tab = append_menu_item(windowMenu, wxID_HIGHEST + 3, _(L("&Filament Settings Tab")) + "\tCtrl+3", _(L("Show the filament settings")),
-            [this/*, tab_offset*/](wxCommandEvent&) { select_tab(/*tab_offset + 1*/2); }, "spool", nullptr,
+            [this/*, tab_offset*/](wxCommandEvent&) { select_tab(2); }, "spool", nullptr,
             [this]() {return true; }, this);
         m_changeable_menu_items.push_back(item_material_tab);
         wxMenuItem* item_printer_tab = append_menu_item(windowMenu, wxID_HIGHEST + 4, _(L("Print&er Settings Tab")) + "\tCtrl+4", _(L("Show the printer settings")),
-            [this/*, tab_offset*/](wxCommandEvent&) { select_tab(/*tab_offset + 2*/3); }, "printer", nullptr,
+            [this/*, tab_offset*/](wxCommandEvent&) { select_tab(3); }, "printer", nullptr,
             [this]() {return true; }, this);
         m_changeable_menu_items.push_back(item_printer_tab);
         if (m_plater) {
@@ -1245,17 +1251,25 @@ void MainFrame::load_config(const DynamicPrintConfig& config)
 #endif
 }
 
-void MainFrame::select_tab(size_t tab)
+void MainFrame::select_tab(size_t tab/* = size_t(-1)*/)
 {
-    if (tab == /*(size_t)(-1)*/0) {
+    if (m_layout == slDlg) {
-        if (m_plater && !m_plater->IsShown())
+        if (tab==0)
-            this->switch_to(true);
+            return;
+        // Show/Activate Settings Dialog
+        if (m_settings_dialog->IsShown())
+            m_settings_dialog->SetFocus();
+        else
+            m_settings_dialog->Show();
     }
-    else {
+    else if (m_layout == slNew) {
-        if (m_plater && m_plater->IsShown())
+        m_plater->Show(tab == 0);
-            switch_to(false);
+        m_tabpanel->Show(tab != 0);
-        m_tabpanel->SetSelection(tab);
+        Layout();
     }
+
+    // when tab == -1, it means we should to show the last selected tab 
+    m_tabpanel->SetSelection(tab == (size_t)(-1) ? m_last_selected_tab : (m_layout == slDlg && tab != 0) ? tab-1 : tab);
 }
 
 // Set a camera direction, zoom to all objects.
@@ -1360,5 +1374,66 @@ std::string MainFrame::get_dir_name(const wxString &full_name) const
     return boost::filesystem::path(full_name.wx_str()).parent_path().string();
 }
 
+
+// ----------------------------------------------------------------------------
+// SettingsDialog
+// ----------------------------------------------------------------------------
+
+SettingsDialog::SettingsDialog()
+: DPIDialog(nullptr, wxID_ANY, wxString(SLIC3R_APP_NAME) + " - " + _L("Settings"))
+{
+    this->SetFont(wxGetApp().normal_font());
+
+    wxColour bgr_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
+    this->SetBackgroundColour(bgr_clr);
+
+    // Load the icon either from the exe, or from the ico file.
+#if _WIN32
+    {
+        TCHAR szExeFileName[MAX_PATH];
+        GetModuleFileName(nullptr, szExeFileName, MAX_PATH);
+        SetIcon(wxIcon(szExeFileName, wxBITMAP_TYPE_ICO));
+    }
+#else
+    SetIcon(wxIcon(var("PrusaSlicer_128px.png"), wxBITMAP_TYPE_PNG));
+#endif // _WIN32
+
+    // wxNB_NOPAGETHEME: Disable Windows Vista theme for the Notebook background. The theme performance is terrible on Windows 10
+    // with multiple high resolution displays connected.
+    m_tabpanel = new wxNotebook(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNB_TOP | wxTAB_TRAVERSAL | wxNB_NOPAGETHEME);
+#ifndef __WXOSX__ // Don't call SetFont under OSX to avoid name cutting in ObjectList
+    m_tabpanel->SetFont(Slic3r::GUI::wxGetApp().normal_font());
+#endif
+
+    // initialize layout
+    auto sizer = new wxBoxSizer(wxVERTICAL);
+    sizer->Add(m_tabpanel, 1, wxEXPAND);
+    sizer->SetSizeHints(this);
+    SetSizer(sizer);
+    Fit();
+
+    const wxSize min_size = wxSize(85 * em_unit(), 50 * em_unit());
+#ifdef __APPLE__
+    // Using SetMinSize() on Mac messes up the window position in some cases
+    // cf. https://groups.google.com/forum/#!topic/wx-users/yUKPBBfXWO0
+    SetSize(min_size);
+#else
+    SetMinSize(min_size);
+    SetSize(GetMinSize());
+#endif
+    Layout();
+}
+
+void SettingsDialog::on_dpi_changed(const wxRect& suggested_rect)
+{
+    const int& em = em_unit();
+    const wxSize& size = wxSize(85 * em, 50 * em);
+
+    SetMinSize(size);
+    Fit();
+    Refresh();
+}
+
+
 } // GUI
 } // Slic3r

src/slic3r/GUI/MainFrame.hpp

@@ -43,6 +43,22 @@ struct PresetTab {
     PrinterTechnology technology;
 };
 
+// ----------------------------------------------------------------------------
+// SettingsDialog
+// ----------------------------------------------------------------------------
+
+class SettingsDialog : public DPIDialog
+{
+    wxNotebook* m_tabpanel { nullptr };
+public:
+    SettingsDialog();
+    ~SettingsDialog() {}
+    wxNotebook* get_tabpanel() { return m_tabpanel; }
+
+protected:
+    void on_dpi_changed(const wxRect& suggested_rect) override;
+};
+
 class MainFrame : public DPIFrame
 {
     bool        m_loaded {false};
@@ -57,6 +73,8 @@ class MainFrame : public DPIFrame
 
     PrintHostQueueDialog *m_printhost_queue_dlg;
 
+    size_t      m_last_selected_tab {1};
+
     std::string     get_base_name(const wxString &full_name, const char *extension = nullptr) const;
     std::string     get_dir_name(const wxString &full_name) const;
 
@@ -94,6 +112,12 @@ class MainFrame : public DPIFrame
 
     wxFileHistory m_recent_projects;
 
+    enum SettingsLayout {
+        slOld = 0,
+        slNew,
+        slDlg,
+    }               m_layout;
+
 protected:
     virtual void on_dpi_changed(const wxRect &suggested_rect);
 
@@ -109,7 +133,6 @@ public:
     void        update_title();
 
     void        init_tabpanel();
-    void        switch_to(bool plater);
     void        create_preset_tabs();
     void        add_created_tab(Tab* panel);
     void        init_menubar();
@@ -130,7 +153,9 @@ public:
     void        export_configbundle();
     void        load_configbundle(wxString file = wxEmptyString);
     void        load_config(const DynamicPrintConfig& config);
-    void        select_tab(size_t tab);
+    // Select tab in m_tabpanel
+    // When tab == -1, will be selected last selected tab
+    void        select_tab(size_t tab = size_t(-1));
     void        select_view(const std::string& direction);
     // Propagate changed configuration from the Tab to the Plater and save changes to the AppConfig
     void        on_config_changed(DynamicPrintConfig* cfg) const ;
@@ -141,6 +166,7 @@ public:
 
     Plater*             m_plater { nullptr };
     wxNotebook*         m_tabpanel { nullptr };
+    SettingsDialog*     m_settings_dialog { nullptr };
     wxProgressDialog*   m_progress_dialog { nullptr };
     std::shared_ptr<ProgressStatusBar>  m_statusbar;
 

src/slic3r/GUI/OptionsGroup.cpp

@@ -105,6 +105,7 @@ void OptionsGroup::add_undo_buttuns_to_sizer(wxSizer* sizer, const t_field& fiel
 	if (!m_show_modified_btns) {
         field->m_Undo_btn->set_as_hidden();
 		field->m_Undo_to_sys_btn->set_as_hidden();
+		field->m_blinking_bmp->Hide();
 		return;
 	}
 

src/slic3r/GUI/Plater.cpp

@@ -355,10 +355,10 @@ PresetBitmapComboBox(parent, wxSize(15 * wxGetApp().em_unit(), -1)),
         if (page_id == wxNOT_FOUND)
             return;
 
-        wxGetApp().tab_panel()->ChangeSelection(page_id);
+        wxGetApp().tab_panel()->SetSelection(page_id);
 
         // Switch to Settings NotePad
-        wxGetApp().mainframe->switch_to(false);
+        wxGetApp().mainframe->select_tab();
 
         /* In a case of a multi-material printing, for editing another Filament Preset
          * it's needed to select this preset for the "Filament settings" Tab
@@ -1100,9 +1100,8 @@ void Sidebar::jump_to_option(size_t selected)
     const Search::Option& opt = p->searcher.get_option(selected);
     wxGetApp().get_tab(opt.type)->activate_option(opt.opt_key, opt.category);
 
-    // Switch to the Settings NotePad, if plater is shown
+    // Switch to the Settings NotePad
-    if (p->plater->IsShown())
+    wxGetApp().mainframe->select_tab();
-        wxGetApp().mainframe->switch_to(false);
 }
 
 ObjectManipulation* Sidebar::obj_manipul()

src/slic3r/GUI/Preferences.cpp

@@ -117,6 +117,13 @@ void PreferencesDialog::build()
 	m_optgroup_general->append_single_option_line(option);
 #endif
 
+	def.label = L("Show the button for the collapse sidebar");
+	def.type = coBool;
+	def.tooltip = L("If enabled, the button for the collapse sidebar will be appeared in top right corner of the 3D Scene");
+	def.set_default_value(new ConfigOptionBool{ app_config->get("show_collapse_button") == "1" });
+	option = Option(def, "show_collapse_button");
+	m_optgroup_general->append_single_option_line(option);
+
 	m_optgroup_camera = std::make_shared<ConfigOptionsGroup>(this, _(L("Camera")));
 	m_optgroup_camera->label_width = 40;
 	m_optgroup_camera->m_on_change = [this](t_config_option_key opt_key, boost::any value) {
@@ -157,6 +164,8 @@ void PreferencesDialog::build()
 	create_icon_size_slider();
 	m_icon_size_sizer->ShowItems(app_config->get("use_custom_toolbar_size") == "1");
 
+	create_settings_mode_widget();
+
 	auto sizer = new wxBoxSizer(wxVERTICAL);
 	sizer->Add(m_optgroup_general->sizer, 0, wxEXPAND | wxBOTTOM | wxLEFT | wxRIGHT, 10);
 	sizer->Add(m_optgroup_camera->sizer, 0, wxEXPAND | wxBOTTOM | wxLEFT | wxRIGHT, 10);
@@ -167,7 +176,7 @@ void PreferencesDialog::build()
 	auto buttons = CreateStdDialogButtonSizer(wxOK | wxCANCEL);
 	wxButton* btn = static_cast<wxButton*>(FindWindowById(wxID_OK, this));
 	btn->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { accept(); });
-	sizer->Add(buttons, 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 10);
+	sizer->Add(buttons, 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 5);
 
 	SetSizer(sizer);
 	sizer->SetSizeHints(this);
@@ -179,8 +188,33 @@ void PreferencesDialog::accept()
         warning_catcher(this, wxString::Format(_(L("You need to restart %s to make the changes effective.")), SLIC3R_APP_NAME));
 	}
 
-	auto app_config = get_app_config();
+	bool settings_layout_changed =	m_values.find("old_settings_layout_mode") != m_values.end() ||
-	for (std::map<std::string, std::string>::iterator it = m_values.begin(); it != m_values.end(); ++it) {
+		                            m_values.find("new_settings_layout_mode") != m_values.end() ||
+		                            m_values.find("dlg_settings_layout_mode") != m_values.end();
+
+	bool canceled = false;
+	if (settings_layout_changed) {
+		// the dialog needs to be destroyed before the call to recreate_gui()
+		// or sometimes the application crashes into wxDialogBase() destructor
+		// so we put it into an inner scope
+		wxMessageDialog dialog(nullptr,
+			            _L("Switching the settings layout mode will trigger application restart.\n"
+				                  "You will lose content of the plater.") + "\n\n" +
+			                   _L("Do you want to proceed?"),
+			wxString(SLIC3R_APP_NAME) + " - " + _L("Switching the settings layout mode"),
+			wxICON_QUESTION | wxOK | wxCANCEL);
+
+		if (dialog.ShowModal() == wxID_CANCEL)
+			canceled = true;
+	}
+
+    auto app_config = get_app_config();
+	for (std::map<std::string, std::string>::iterator it = m_values.begin(); it != m_values.end(); ++it)
+	{
+		if (canceled && (it->first == "old_settings_layout_mode" ||
+			             it->first == "new_settings_layout_mode" ||
+			             it->first == "dlg_settings_layout_mode" ))
+			continue;
 		app_config->set(it->first, it->second);
 	}
 
@@ -188,8 +222,12 @@ void PreferencesDialog::accept()
 
 	EndModal(wxID_OK);
 
-	// Nothify the UI to update itself from the ini file.
+	if (settings_layout_changed && !canceled)
-    wxGetApp().update_ui_from_settings();
+		// recreate application, if settings layout was changed
+		wxGetApp().recreate_GUI();
+	else
+	    // Nothify the UI to update itself from the ini file.
+        wxGetApp().update_ui_from_settings();
 }
 
 void PreferencesDialog::on_dpi_changed(const wxRect &suggested_rect)
@@ -272,6 +310,38 @@ void PreferencesDialog::create_icon_size_slider()
 	m_optgroup_gui->sizer->Add(m_icon_size_sizer, 0, wxEXPAND | wxALL, em);
 }
 
+void PreferencesDialog::create_settings_mode_widget()
+{
+	wxString choices[] = {	_L("Old regular layout with tab bar"),
+							_L("New layout without the tab bar on the platter"),
+							_L("Settings will be shown in non-modal dialog")		};
+
+	auto app_config = get_app_config();
+	int selection = app_config->get("old_settings_layout_mode") == "1" ? 0 :
+	                app_config->get("new_settings_layout_mode") == "1" ? 1 :
+	                app_config->get("dlg_settings_layout_mode") == "1" ? 2 : 0;
+
+	wxWindow* parent = m_optgroup_gui->ctrl_parent();
+
+	wxRadioBox* box = new wxRadioBox(parent, wxID_ANY, _L("Settings layout mode"), wxDefaultPosition, wxDefaultSize, WXSIZEOF(choices), choices,
+		3, wxRA_SPECIFY_ROWS);
+	box->SetButtonFont(wxGetApp().normal_font());
+	box->SetSelection(selection);
+
+	box->Bind(wxEVT_RADIOBOX, [this](wxCommandEvent& e) {
+		int selection = e.GetSelection();
+
+		m_values["old_settings_layout_mode"] = boost::any_cast<bool>(selection == 0) ? "1" : "0";
+		m_values["new_settings_layout_mode"] = boost::any_cast<bool>(selection == 1) ? "1" : "0";
+		m_values["dlg_settings_layout_mode"] = boost::any_cast<bool>(selection == 2) ? "1" : "0";
+	});
+
+	auto sizer = new wxBoxSizer(wxHORIZONTAL);
+	sizer->Add(box, 1, wxALIGN_CENTER_VERTICAL);
+
+	m_optgroup_gui->sizer->Add(sizer, 0, wxEXPAND | wxALL, em_unit());
+}
+
 
 } // GUI
 } // Slic3r

src/slic3r/GUI/Preferences.hpp

@@ -31,6 +31,7 @@ protected:
     void on_dpi_changed(const wxRect &suggested_rect) override;
     void layout();
     void create_icon_size_slider();
+    void create_settings_mode_widget();
 };
 
 } // GUI