diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index e8cd6d0831..55627b9015 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -3281,7 +3281,7 @@ void GLCanvas3D::on_key(wxKeyEvent& evt)
                     // m_canvas->HandleAsNavigationKey(evt);   // XXX: Doesn't work in some cases / on Linux
                     //post_event(SimpleEvent(EVT_GLCANVAS_TAB));
                 }
-                else if (keyCode == WXK_TAB && evt.ShiftDown() && ! wxGetApp().is_gcode_viewer()) {
+                else if (keyCode == WXK_TAB && evt.ShiftDown() && !evt.ControlDown() && ! wxGetApp().is_gcode_viewer()) {
                     // Collapse side-panel with Shift+Tab
                     post_event(SimpleEvent(EVT_GLCANVAS_COLLAPSE_SIDEBAR));
                 }
diff --git a/src/slic3r/GUI/RecenterDialog.cpp b/src/slic3r/GUI/RecenterDialog.cpp
index 3ed70fe996..3fc25cfa64 100644
--- a/src/slic3r/GUI/RecenterDialog.cpp
+++ b/src/slic3r/GUI/RecenterDialog.cpp
@@ -22,6 +22,8 @@ RecenterDialog::RecenterDialog(wxWindow* parent, wxWindowID id, const wxString&
 
     init_bitmap();
 
+    SetBackgroundColour(*wxWHITE);
+
     auto* main_sizer = new wxBoxSizer(wxVERTICAL);
     auto* button_sizer = new wxBoxSizer(wxHORIZONTAL);