diff --git a/resources/icons/prusa_slicer_logo.svg b/resources/icons/prusa_slicer_logo.svg
new file mode 100644
index 0000000000..927c3e70ba
--- /dev/null
+++ b/resources/icons/prusa_slicer_logo.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="800" height="800" viewBox="0 0 800 800">
+  <circle cx="400" cy="400" r="400" fill="#fff"/>
+  <path d="M599.3,186.8c-93.9-93.9-246.1-93.9-340,0s-93.9,246.1,0,340Z" transform="translate(0 0)" fill="#363636"/>
+  <path d="M202.7,612.5c93.9,93.9,246.1,93.9,340,0s93.9-246.1,0-340" transform="translate(0 0)" fill="#ed6b21"/>
+</svg>
diff --git a/src/slic3r/GUI/AboutDialog.cpp b/src/slic3r/GUI/AboutDialog.cpp
index 92f8d1fdbd..f95b8d93ba 100644
--- a/src/slic3r/GUI/AboutDialog.cpp
+++ b/src/slic3r/GUI/AboutDialog.cpp
@@ -52,7 +52,7 @@ CopyrightsDialog::CopyrightsDialog()
     m_html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, 
                               wxSize(40 * em_unit(), 20 * em_unit()), wxHW_SCROLLBAR_AUTO);
 
-    wxFont font = GetFont();
+    wxFont font = get_default_font_for_dpi(get_dpi_for_window(this));// GetFont();
     const int fs = font.GetPointSize();
     const int fs2 = static_cast<int>(1.2f*fs);
     int size[] = { fs, fs, fs, fs, fs2, fs2, fs2 };
@@ -249,7 +249,7 @@ AboutDialog::AboutDialog()
     m_html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO/*NEVER*/);
     {
         m_html->SetMinSize(wxSize(-1, 16 * wxGetApp().em_unit()));
-        wxFont font = GetFont();
+        wxFont font = get_default_font_for_dpi(get_dpi_for_window(this));// 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());
diff --git a/src/slic3r/GUI/ConfigSnapshotDialog.cpp b/src/slic3r/GUI/ConfigSnapshotDialog.cpp
index 6a44b96dc6..4855bea81e 100644
--- a/src/slic3r/GUI/ConfigSnapshotDialog.cpp
+++ b/src/slic3r/GUI/ConfigSnapshotDialog.cpp
@@ -114,7 +114,7 @@ ConfigSnapshotDialog::ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db
     // text
     html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO);
     {
-        wxFont font = wxGetApp().normal_font();//wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        wxFont font = get_default_font_for_dpi(get_dpi_for_window(this));// wxGetApp().normal_font();//wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
         #ifdef __WXMSW__
             const int fs = font.GetPointSize();
             const int fs1 = static_cast<int>(0.8f*fs);
@@ -140,7 +140,7 @@ ConfigSnapshotDialog::ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db
 
 void ConfigSnapshotDialog::on_dpi_changed(const wxRect &suggested_rect)
 {
-    wxFont font = GetFont();
+    wxFont font = get_default_font_for_dpi(get_dpi_for_window(this));// GetFont();
     const int fs = font.GetPointSize();
     const int fs1 = static_cast<int>(0.8f*fs);
     const int fs2 = static_cast<int>(1.1f*fs);
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index d444017f40..08219ed865 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -30,6 +30,7 @@
 
 #include <wx/dialog.h>
 #include <wx/textctrl.h>
+#include <wx/splash.h>
 
 #include "libslic3r/Utils.hpp"
 #include "libslic3r/Model.hpp"
@@ -76,6 +77,46 @@ namespace GUI {
 
 class MainFrame;
 
+class SplashScreen : public wxSplashScreen
+{
+public:
+    SplashScreen(const wxBitmap& bitmap, long splashStyle, int milliseconds, wxWindow* parent)
+        : wxSplashScreen(bitmap, splashStyle, milliseconds, parent, wxID_ANY)
+    {
+        wxASSERT(bitmap.IsOk());
+        m_main_bitmap = bitmap;
+    }
+
+    void SetText(const wxString& text)
+    {
+        SetBmp(m_main_bitmap);
+        if (!text.empty()) {
+            wxBitmap bitmap(m_main_bitmap);
+            wxMemoryDC memDC;
+
+            memDC.SelectObject(bitmap);
+
+            memDC.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold());
+            memDC.SetTextForeground(wxColour(237, 107, 33));
+            memDC.DrawText(text, 120, 120);
+
+            memDC.SelectObject(wxNullBitmap);
+            SetBmp(bitmap);
+        }
+        wxYield();
+    }
+
+    void SetBmp(wxBitmap& bmp)
+    {
+        m_window->SetBitmap(bmp);
+        m_window->Refresh();
+        m_window->Update();
+    }
+
+private:
+    wxBitmap m_main_bitmap;
+};
+
 wxString file_wildcards(FileType file_type, const std::string &custom_extension)
 {
     static const std::string defaults[FT_SIZE] = {
@@ -389,6 +430,10 @@ bool GUI_App::on_init_inner()
     
     app_config->set("version", SLIC3R_VERSION);
     app_config->save();
+
+    wxBitmap bitmap = create_scaled_bitmap("prusa_slicer_logo", nullptr, 400);
+    SplashScreen* scrn = new SplashScreen(bitmap, wxSPLASH_CENTRE_ON_SCREEN | wxSPLASH_TIMEOUT, 4000, nullptr);
+    scrn->SetText(_L("Loading configuration..."));
     
     preset_bundle = new PresetBundle();
     
@@ -439,6 +484,8 @@ bool GUI_App::on_init_inner()
     // application frame
     if (wxImage::FindHandler(wxBITMAP_TYPE_PNG) == nullptr)
         wxImage::AddHandler(new wxPNGHandler());
+    scrn->SetText(_L("Creating settings tabs..."));
+
     mainframe = new MainFrame();
     // hide settings tabs after first Layout
     mainframe->select_tab(0);
diff --git a/src/slic3r/GUI/GUI_Utils.hpp b/src/slic3r/GUI/GUI_Utils.hpp
index 96b24524c2..f29e0cd848 100644
--- a/src/slic3r/GUI/GUI_Utils.hpp
+++ b/src/slic3r/GUI/GUI_Utils.hpp
@@ -219,16 +219,12 @@ private:
     {
         this->Freeze();
 
-#if wxVERSION_EQUAL_OR_GREATER_THAN(3,1,3)
-        if (m_force_rescale) {
-#endif // wxVERSION_EQUAL_OR_GREATER_THAN
-            // rescale fonts of all controls
-            scale_controls_fonts(this, m_new_font_point_size);
-            // rescale current window font
-            scale_win_font(this, m_new_font_point_size);
-#if wxVERSION_EQUAL_OR_GREATER_THAN(3,1,3)
-            m_force_rescale = false;
-        }
+        m_force_rescale = false;
+#if !wxVERSION_EQUAL_OR_GREATER_THAN(3,1,3)
+        // rescale fonts of all controls
+        scale_controls_fonts(this, m_new_font_point_size);
+        // rescale current window font
+        scale_win_font(this, m_new_font_point_size);
 #endif // wxVERSION_EQUAL_OR_GREATER_THAN
 
         // set normal application font as a current window font
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.cpp b/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.cpp
index af1517637f..6b3456b60e 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.cpp
@@ -285,5 +285,12 @@ void GLGizmoFdmSupports::update_from_model_object()
 }
 
 
+
+PainterGizmoType GLGizmoFdmSupports::get_painter_type() const
+{
+    return PainterGizmoType::FDM_SUPPORTS;
+}
+
+
 } // namespace GUI
 } // namespace Slic3r
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.hpp b/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.hpp
index 913133617c..0c39992f0b 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.hpp
@@ -27,6 +27,7 @@ private:
 
     void on_opening() override {}
     void on_shutdown() override;
+    PainterGizmoType get_painter_type() const override;
 
     void select_facets_by_angle(float threshold, bool block);
     float m_angle_threshold_deg = 45.f;
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp
index 1809b417cc..ed98bf71d5 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp
@@ -28,13 +28,19 @@ GLGizmoPainterBase::GLGizmoPainterBase(GLCanvas3D& parent, const std::string& ic
 void GLGizmoPainterBase::activate_internal_undo_redo_stack(bool activate)
 {
     if (activate && ! m_internal_stack_active) {
-        Plater::TakeSnapshot(wxGetApp().plater(), _L("FDM gizmo turned on"));
+        wxString str = get_painter_type() == PainterGizmoType::FDM_SUPPORTS
+                           ? _L("Supports gizmo turned on")
+                           : _L("Seam gizmo turned on");
+        Plater::TakeSnapshot(wxGetApp().plater(), str);
         wxGetApp().plater()->enter_gizmos_stack();
         m_internal_stack_active = true;
     }
     if (! activate && m_internal_stack_active) {
+        wxString str = get_painter_type() == PainterGizmoType::SEAM
+                           ? _L("Seam gizmo turned off")
+                           : _L("Supports gizmo turned off");
         wxGetApp().plater()->leave_gizmos_stack();
-        Plater::TakeSnapshot(wxGetApp().plater(), _L("FDM gizmo turned off"));
+        Plater::TakeSnapshot(wxGetApp().plater(), str);
         m_internal_stack_active = false;
     }
 }
@@ -356,11 +362,28 @@ bool GLGizmoPainterBase::gizmo_event(SLAGizmoEventType action, const Vec2d& mous
     if ((action == SLAGizmoEventType::LeftUp || action == SLAGizmoEventType::RightUp)
       && m_button_down != Button::None) {
         // Take snapshot and update ModelVolume data.
-        wxString action_name = shift_down
-                ? _L("Remove selection")
-                : (m_button_down == Button::Left
-                   ? _L("Add supports")
-                   : _L("Block supports"));
+        wxString action_name;
+        if (get_painter_type() == PainterGizmoType::FDM_SUPPORTS) {
+            if (shift_down)
+                action_name = _L("Remove selection");
+            else {
+                if (m_button_down == Button::Left)
+                    action_name = _L("Add supports");
+                else
+                    action_name = _L("Block supports");
+            }
+        }
+        if (get_painter_type() == PainterGizmoType::SEAM) {
+            if (shift_down)
+                action_name = _L("Remove selection");
+            else {
+                if (m_button_down == Button::Left)
+                    action_name = _L("Enforce seam");
+                else
+                    action_name = _L("Block seam");
+            }
+        }
+
         activate_internal_undo_redo_stack(true);
         Plater::TakeSnapshot(wxGetApp().plater(), action_name);
         update_model_object();
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp
index da9b378957..b3e2b65f1f 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp
@@ -22,6 +22,10 @@ namespace GUI {
 enum class SLAGizmoEventType : unsigned char;
 class ClippingPlane;
 
+enum class PainterGizmoType {
+    FDM_SUPPORTS,
+    SEAM
+};
 
 
 class TriangleSelectorGUI : public TriangleSelector {
@@ -103,6 +107,7 @@ protected:
 
     virtual void on_opening() = 0;
     virtual void on_shutdown() = 0;
+    virtual PainterGizmoType get_painter_type() const = 0;
 
     bool on_is_activable() const override;
     bool on_is_selectable() const override;
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSeam.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSeam.cpp
index 3c7d180a7b..d0edfba131 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSeam.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSeam.cpp
@@ -204,5 +204,12 @@ void GLGizmoSeam::update_from_model_object()
 }
 
 
+PainterGizmoType GLGizmoSeam::get_painter_type() const
+{
+    return PainterGizmoType::SEAM;
+}
+
+
+
 } // namespace GUI
 } // namespace Slic3r
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSeam.hpp b/src/slic3r/GUI/Gizmos/GLGizmoSeam.hpp
index 469ec9180c..c3eb98c808 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSeam.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSeam.hpp
@@ -16,6 +16,7 @@ public:
 protected:
     void on_render_input_window(float x, float y, float bottom_limit) override;
     std::string on_get_name() const override;
+    PainterGizmoType get_painter_type() const override;
 
 private:
     bool on_init() override;
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index bab5d7502e..f6fd939e25 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -55,29 +55,6 @@ enum class ERescaleTarget
     SettingsDialog
 };
 
-static void rescale_dialog_after_dpi_change(MainFrame& mainframe, SettingsDialog& dialog, ERescaleTarget target)
-{
-    int mainframe_dpi = get_dpi_for_window(&mainframe);
-    int dialog_dpi = get_dpi_for_window(&dialog);
-    if (mainframe_dpi != dialog_dpi) {
-        if (target == ERescaleTarget::SettingsDialog) {
-            dialog.enable_force_rescale();
-#if wxVERSION_EQUAL_OR_GREATER_THAN(3,1,3)
-            dialog.GetEventHandler()->AddPendingEvent(wxDPIChangedEvent(wxSize(mainframe_dpi, mainframe_dpi), wxSize(dialog_dpi, dialog_dpi)));
-#else
-            dialog.GetEventHandler()->AddPendingEvent(DpiChangedEvent(EVT_DPI_CHANGED_SLICER, dialog_dpi, dialog.GetRect()));
-#endif // wxVERSION_EQUAL_OR_GREATER_THAN
-        } else {
-#if wxVERSION_EQUAL_OR_GREATER_THAN(3,1,3)
-            mainframe.GetEventHandler()->AddPendingEvent(wxDPIChangedEvent(wxSize(dialog_dpi, dialog_dpi), wxSize(mainframe_dpi, mainframe_dpi)));
-#else
-            mainframe.enable_force_rescale();
-            mainframe.GetEventHandler()->AddPendingEvent(DpiChangedEvent(EVT_DPI_CHANGED_SLICER, mainframe_dpi, mainframe.GetRect()));
-#endif // wxVERSION_EQUAL_OR_GREATER_THAN
-        }
-    }
-}
-
 MainFrame::MainFrame() :
 DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "mainframe"),
     m_printhost_queue_dlg(new PrintHostQueueDialog(this))
@@ -310,9 +287,6 @@ void MainFrame::update_layout()
             m_plater_page = nullptr;
         }
 
-        if (m_layout == ESettingsLayout::Dlg)
-            rescale_dialog_after_dpi_change(*this, m_settings_dialog, ERescaleTarget::Mainframe);
-
         clean_sizer(m_main_sizer);
         clean_sizer(m_settings_dialog.GetSizer());
 
@@ -347,6 +321,16 @@ void MainFrame::update_layout()
     if (m_layout != ESettingsLayout::Unknown)
         restore_to_creation();
 
+#ifdef __WXMSW__
+    enum class State {
+        noUpdate,
+        fromDlg,
+        toDlg
+    };
+    State update_scaling_state = m_layout == ESettingsLayout::Dlg ? State::fromDlg :
+                                 layout   == ESettingsLayout::Dlg ? State::toDlg   : State::noUpdate;
+#endif //__WXMSW__
+
     m_layout = layout;
 
     // From the very beginning the Print settings should be selected
@@ -383,9 +367,6 @@ void MainFrame::update_layout()
         m_main_sizer->Add(m_plater, 1, wxEXPAND);
         m_tabpanel->Reparent(&m_settings_dialog);
         m_settings_dialog.GetSizer()->Add(m_tabpanel, 1, wxEXPAND);
-
-        rescale_dialog_after_dpi_change(*this, m_settings_dialog, ERescaleTarget::SettingsDialog);
-
         m_tabpanel->Show();
         m_plater->Show();
         break;
@@ -400,6 +381,36 @@ void MainFrame::update_layout()
 #endif // ENABLE_GCODE_VIEWER
     }
 
+#ifdef __WXMSW__
+    if (update_scaling_state != State::noUpdate)
+    {
+        int mainframe_dpi   = get_dpi_for_window(this);
+        int dialog_dpi      = get_dpi_for_window(&m_settings_dialog);
+        if (mainframe_dpi != dialog_dpi) {
+            wxSize oldDPI = update_scaling_state == State::fromDlg ? wxSize(dialog_dpi, dialog_dpi) : wxSize(mainframe_dpi, mainframe_dpi);
+            wxSize newDPI = update_scaling_state == State::toDlg   ? wxSize(dialog_dpi, dialog_dpi) : wxSize(mainframe_dpi, mainframe_dpi);
+
+            if (update_scaling_state == State::fromDlg)
+                this->enable_force_rescale();
+            else
+                (&m_settings_dialog)->enable_force_rescale();
+
+            wxWindow* win { nullptr };
+            if (update_scaling_state == State::fromDlg)
+                win = this;
+            else
+                win = &m_settings_dialog;
+
+#if wxVERSION_EQUAL_OR_GREATER_THAN(3,1,3)
+            m_tabpanel->MSWUpdateOnDPIChange(oldDPI, newDPI);
+            win->GetEventHandler()->AddPendingEvent(wxDPIChangedEvent(oldDPI, newDPI));
+#else
+            win->GetEventHandler()->AddPendingEvent(DpiChangedEvent(EVT_DPI_CHANGED_SLICER, newDPI, win->GetRect()));
+#endif // wxVERSION_EQUAL_OR_GREATER_THAN
+        }
+    }
+#endif //__WXMSW__
+
 //#ifdef __APPLE__
 //    // Using SetMinSize() on Mac messes up the window position in some cases
 //    // cf. https://groups.google.com/forum/#!topic/wx-users/yUKPBBfXWO0
@@ -787,9 +798,6 @@ void MainFrame::on_dpi_changed(const wxRect& suggested_rect)
     this->SetSize(sz);
 
     this->Maximize(is_maximized);
-
-    if (m_layout == ESettingsLayout::Dlg)
-        rescale_dialog_after_dpi_change(*this, m_settings_dialog, ERescaleTarget::SettingsDialog);
 }
 
 void MainFrame::on_sys_color_changed()
@@ -1988,7 +1996,14 @@ SettingsDialog::SettingsDialog(MainFrame* mainframe)
         wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER | wxMINIMIZE_BOX | wxMAXIMIZE_BOX, "settings_dialog"),
     m_main_frame(mainframe)
 {
+#if ENABLE_WX_3_1_3_DPI_CHANGED_EVENT && 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));
+#else
     this->SetFont(wxGetApp().normal_font());
+#endif // ENABLE_WX_3_1_3_DPI_CHANGED_EVENT
     this->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 
 
diff --git a/src/slic3r/GUI/PresetComboBoxes.cpp b/src/slic3r/GUI/PresetComboBoxes.cpp
index 7300a2887f..8bc9393873 100644
--- a/src/slic3r/GUI/PresetComboBoxes.cpp
+++ b/src/slic3r/GUI/PresetComboBoxes.cpp
@@ -1194,7 +1194,7 @@ SavePresetDialog::~SavePresetDialog()
 void SavePresetDialog::build(std::vector<Preset::Type> types, std::string suffix)
 {
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-#if ENABLE_WX_3_1_3_DPI_CHANGED_EVENT
+#if ENABLE_WX_3_1_3_DPI_CHANGED_EVENT && 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
diff --git a/src/slic3r/GUI/SysInfoDialog.cpp b/src/slic3r/GUI/SysInfoDialog.cpp
index 3bd0fcf9f7..7a41aca1c3 100644
--- a/src/slic3r/GUI/SysInfoDialog.cpp
+++ b/src/slic3r/GUI/SysInfoDialog.cpp
@@ -109,7 +109,7 @@ SysInfoDialog::SysInfoDialog()
     }
 
     // main_info_text
-    wxFont font = wxGetApp().normal_font();
+    wxFont font = get_default_font_for_dpi(get_dpi_for_window(this));// 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());
@@ -175,7 +175,7 @@ void SysInfoDialog::on_dpi_changed(const wxRect &suggested_rect)
     m_logo_bmp.msw_rescale();
     m_logo->SetBitmap(m_logo_bmp.bmp());
 
-    wxFont font = GetFont();
+    wxFont font = get_default_font_for_dpi(get_dpi_for_window(this));// 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 };
 
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index b95227dad9..29c9e33022 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -102,7 +102,7 @@ Tab::Tab(wxNotebook* parent, const wxString& title, Preset::Type type) :
 
     wxGetApp().tabs_list.push_back(this);
 
-    m_em_unit = wxGetApp().em_unit();
+    m_em_unit = em_unit(m_parent); //wxGetApp().em_unit();
 
     m_config_manipulation = get_config_manipulation();
 
diff --git a/src/slic3r/GUI/UnsavedChangesDialog.cpp b/src/slic3r/GUI/UnsavedChangesDialog.cpp
index f30e719ce0..5a0d23a209 100644
--- a/src/slic3r/GUI/UnsavedChangesDialog.cpp
+++ b/src/slic3r/GUI/UnsavedChangesDialog.cpp
@@ -531,7 +531,7 @@ void UnsavedChangesDialog::build(Preset::Type type, PresetCollection* dependent_
     wxColour bgr_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
     SetBackgroundColour(bgr_clr);
 
-#if ENABLE_WX_3_1_3_DPI_CHANGED_EVENT
+#if ENABLE_WX_3_1_3_DPI_CHANGED_EVENT && 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