diff --git a/src/slic3r/GUI/AppConfig.cpp b/src/slic3r/GUI/AppConfig.cpp
index 3b0382870..94f279101 100644
--- a/src/slic3r/GUI/AppConfig.cpp
+++ b/src/slic3r/GUI/AppConfig.cpp
@@ -91,6 +91,9 @@ void AppConfig::set_defaults()
     if (get("use_perspective_camera").empty())
         set("use_perspective_camera", "1");
 
+    if (get("objects_always_expert").empty())
+        set("objects_always_expert", "1");
+
     if (get("use_free_camera").empty())
         set("use_free_camera", "0");
 
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 73ecd8699..33cf264a2 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -4692,7 +4692,7 @@ bool GLCanvas3D::_init_main_toolbar()
     item.tooltip = _utf8(L("Add instance")) + " [+]";
     item.sprite_id = 6;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_MORE)); };
-    item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
+    item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple || wxGetApp().app_config->get("objects_always_expert") == "1"; };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_increase_instances(); };
 
     if (!m_main_toolbar.add_item(item))
@@ -4703,7 +4703,7 @@ bool GLCanvas3D::_init_main_toolbar()
     item.tooltip = _utf8(L("Remove instance")) + " [-]";
     item.sprite_id = 7;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_FEWER)); };
-    item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
+    item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple || wxGetApp().app_config->get("objects_always_expert") == "1"; };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_decrease_instances(); };
     if (!m_main_toolbar.add_item(item))
         return false;
@@ -4716,7 +4716,7 @@ bool GLCanvas3D::_init_main_toolbar()
     item.tooltip = _utf8(L("Split to objects"));
     item.sprite_id = 8;
     item.left.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_SPLIT_OBJECTS)); };
-    item.visibility_callback = GLToolbarItem::Default_Visibility_Callback;
+    item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
     item.enabling_callback = []()->bool { return wxGetApp().plater()->can_split_to_objects(); };
     if (!m_main_toolbar.add_item(item))
         return false;
diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index 6c7221e91..f5c06f84f 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -1436,7 +1436,7 @@ void ObjectList::show_settings(const wxDataViewItem settings_item)
 wxMenu* ObjectList::append_submenu_add_generic(wxMenu* menu, const ModelVolumeType type) {
     auto sub_menu = new wxMenu;
 
-    if (wxGetApp().get_mode() == comExpert && type != ModelVolumeType::INVALID) {
+    if ( (wxGetApp().get_mode() == comExpert || wxGetApp().app_config->get("objects_always_expert") == "1") && type != ModelVolumeType::INVALID) {
     append_menu_item(sub_menu, wxID_ANY, _(L("Load")) + " " + dots, "",
         [this, type](wxCommandEvent&) { load_subobject(type); }, "", menu);
     sub_menu->AppendSeparator();
@@ -1466,13 +1466,13 @@ void ObjectList::append_menu_items_add_volume(wxMenu* menu)
 
     wxWindow* parent = wxGetApp().plater();
 
-    if (mode == comAdvanced) {
+    if (mode == comAdvanced && wxGetApp().app_config->get("objects_always_expert") != "1") {
         append_menu_item(menu, wxID_ANY, _(ADD_VOLUME_MENU_ITEMS[int(ModelVolumeType::MODEL_PART)].first), "",
             [this](wxCommandEvent&) { load_subobject(ModelVolumeType::MODEL_PART); }, 
             ADD_VOLUME_MENU_ITEMS[int(ModelVolumeType::MODEL_PART)].second, nullptr,
             [this]() { return is_instance_or_object_selected(); }, parent);
     }
-    if (mode == comSimple) {
+    if (mode == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1") {
         append_menu_item(menu, wxID_ANY, _(ADD_VOLUME_MENU_ITEMS[int(ModelVolumeType::SUPPORT_ENFORCER)].first), "",
             [this](wxCommandEvent&) { load_generic_subobject(L("Box"), ModelVolumeType::SUPPORT_ENFORCER); },
             ADD_VOLUME_MENU_ITEMS[int(ModelVolumeType::SUPPORT_ENFORCER)].second, nullptr,
@@ -1485,7 +1485,7 @@ void ObjectList::append_menu_items_add_volume(wxMenu* menu)
         return;
     }
     
-    for (size_t type = (mode == comExpert ? 0 : 1) ; type < ADD_VOLUME_MENU_ITEMS.size(); type++)
+    for (size_t type = (mode == comExpert || wxGetApp().app_config->get("objects_always_expert") == "1" ? 0 : 1) ; type < ADD_VOLUME_MENU_ITEMS.size(); type++)
     {
         auto& item = ADD_VOLUME_MENU_ITEMS[type];
 
@@ -1565,7 +1565,7 @@ wxMenuItem* ObjectList::append_menu_item_settings(wxMenu* menu_)
         return nullptr;
 
     const ConfigOptionMode mode = wxGetApp().get_mode();
-    if (mode == comSimple)
+    if (mode == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1")
         return nullptr;
 
     // Create new items for settings popupmenu
@@ -1583,7 +1583,7 @@ wxMenuItem* ObjectList::append_menu_item_settings(wxMenu* menu_)
                                     (item_type == itUndef && selection.is_single_full_object()); 
     create_freq_settings_popupmenu(menu, is_object_settings);
 
-    if (mode == comAdvanced)
+    if (mode == comAdvanced && wxGetApp().app_config->get("objects_always_expert") != "1")
         return nullptr;
 
     menu->SetSecondSeparator();
diff --git a/src/slic3r/GUI/GUI_ObjectManipulation.cpp b/src/slic3r/GUI/GUI_ObjectManipulation.cpp
index 36293525a..1c3c79fe4 100644
--- a/src/slic3r/GUI/GUI_ObjectManipulation.cpp
+++ b/src/slic3r/GUI/GUI_ObjectManipulation.cpp
@@ -420,7 +420,7 @@ void ObjectManipulation::Show(const bool show)
 		// Show all lines of the panel. Some of these lines will be hidden in the lines below.
 		m_og->Show(show);
 
-        if (show && wxGetApp().get_mode() != comSimple) {
+        if (show && wxGetApp().get_mode() != comSimple && wxGetApp().app_config->get("objects_always_expert") != "1") {
             // Show the label and the name of the STL in simple mode only.
             // Label "Name: "
             m_main_grid_sizer->Show(size_t(0), false);
@@ -431,7 +431,8 @@ void ObjectManipulation::Show(const bool show)
 
 	if (show) {
 		// Show the "World Coordinates" / "Local Coordintes" Combo in Advanced / Expert mode only.
-		bool show_world_local_combo = wxGetApp().plater()->canvas3D()->get_selection().is_single_full_instance() && wxGetApp().get_mode() != comSimple;
+		bool show_world_local_combo = wxGetApp().plater()->canvas3D()->get_selection().is_single_full_instance() 
+            && (wxGetApp().get_mode() != comSimple || wxGetApp().app_config->get("objects_always_expert") == "1");
 		m_word_local_combo->Show(show_world_local_combo);
         m_empty_str->Show(!show_world_local_combo);
 	}
@@ -458,7 +459,7 @@ void ObjectManipulation::update_settings_value(const Selection& selection)
     m_new_rotate_label_string = L("Rotation");
     m_new_scale_label_string  = L("Scale factors");
 
-    if (wxGetApp().get_mode() == comSimple)
+    if (wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1")
         m_world_coordinates = true;
 
     ObjectList* obj_list = wxGetApp().obj_list();
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 1cc2b317c..d502b391f 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -1044,7 +1044,7 @@ void Sidebar::update_mode_sizer() const
 void Sidebar::update_reslice_btn_tooltip() const
 {
     wxString tooltip = wxString("Slice") + " [" + GUI::shortkey_ctrl_prefix() + "R]";
-    if (m_mode != comSimple)
+    if (m_mode != comSimple || wxGetApp().app_config->get("objects_always_expert") == "1")
         tooltip += wxString("\n") + _(L("Hold Shift to Slice & Export G-code"));
     p->btn_reslice->SetToolTip(tooltip);
 }
@@ -1133,7 +1133,7 @@ void Sidebar::update_objects_list_extruder_column(size_t extruders_count)
 void Sidebar::show_info_sizer()
 {
     if (!p->plater->is_single_full_object_selection() ||
-        m_mode < comExpert ||
+        (m_mode < comExpert && wxGetApp().app_config->get("objects_always_expert") != "1") ||
         p->plater->model().objects.empty()) {
         p->object_info->Show(false);
         return;
@@ -1378,7 +1378,7 @@ void Sidebar::update_mode()
 
     wxWindowUpdateLocker noUpdates(this);
 
-    p->object_list->get_sizer()->Show(m_mode > comSimple);
+    p->object_list->get_sizer()->Show(m_mode > comSimple || wxGetApp().app_config->get("objects_always_expert") == "1");
 
     p->object_list->unselect_objects();
     p->object_list->update_selections();
@@ -2458,7 +2458,7 @@ std::vector<size_t> Plater::priv::load_files(const std::vector<fs::path>& input_
                     }
                 }
             }
-            else if ((wxGetApp().get_mode() == comSimple) && (type_3mf || type_any_amf) && model_has_advanced_features(model)) {
+            else if ((wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") == "0") && (type_3mf || type_any_amf) && model_has_advanced_features(model)) {
                 wxMessageDialog msg_dlg(q, _(L("This file cannot be loaded in a simple mode. Do you want to switch to an advanced mode?"))+"\n",
                     _(L("Detected advanced data")), wxICON_WARNING | wxYES | wxNO);
                 if (msg_dlg.ShowModal() == wxID_YES)
@@ -3220,7 +3220,7 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
         sidebar->set_btn_label(ActionButtonType::abExport, _(label_btn_export));
         sidebar->set_btn_label(ActionButtonType::abSendGCode, _(label_btn_send));
 
-        const wxString slice_string = background_process.running() && wxGetApp().get_mode() == comSimple ?
+        const wxString slice_string = background_process.running() && wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1" ?
                                       _(L("Slicing")) + dots : _(L("Slice now"));
         sidebar->set_btn_label(ActionButtonType::abReslice, slice_string);
 
@@ -3799,11 +3799,11 @@ void Plater::priv::on_process_completed(wxCommandEvent &evt)
 	
 
     if (canceled) {
-        if (wxGetApp().get_mode() == comSimple)
+        if (wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1")
             sidebar->set_btn_label(ActionButtonType::abReslice, "Slice now");
         show_action_buttons(true);
     }
-    else if (this->writing_to_removable_device || wxGetApp().get_mode() == comSimple)
+    else if (this->writing_to_removable_device || (wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1"))
 		show_action_buttons(false);
     this->writing_to_removable_device = false;
 }
@@ -3887,7 +3887,7 @@ void Plater::priv::on_right_click(RBtnEvent& evt)
              * Suppress to show those items for a Simple mode
              */
             const MenuIdentifier id = printer_technology == ptSLA ? miObjectSLA : miObjectFFF;
-            if (wxGetApp().get_mode() == comSimple) {
+            if (wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1") {
                 if (menu->FindItem(_(L("Add instance"))) != wxNOT_FOUND)
                 {
                     /* Detach an items from the menu, but don't delete them
@@ -4120,7 +4120,7 @@ bool Plater::priv::complit_init_object_menu()
         [this](wxCommandEvent&) { split_volume(); }, "split_parts_SMALL",   &object_menu, [this]() { return can_split(); }, q);
 
     append_submenu(&object_menu, split_menu, wxID_ANY, _(L("Split")), _(L("Split the selected object")), "",
-        [this]() { return can_split() && wxGetApp().get_mode() > comSimple; }, q);
+        [this]() { return can_split() && wxGetApp().get_mode() > comSimple || wxGetApp().app_config->get("objects_always_expert") == "1"; }, q);
     object_menu.AppendSeparator();
 
     // Layers Editing for object
@@ -4611,7 +4611,7 @@ void Plater::priv::update_after_undo_redo(const UndoRedo::Snapshot& snapshot, bo
 
     wxGetApp().obj_list()->update_after_undo_redo();
 
-    if (wxGetApp().get_mode() == comSimple && model_has_advanced_features(this->model)) {
+    if (wxGetApp().get_mode() == comSimple && model_has_advanced_features(this->model) && wxGetApp().app_config->get("objects_always_expert") != "1") {
         // If the user jumped to a snapshot that require user interface with advanced features, switch to the advanced mode without asking.
         // There is a little risk of surprising the user, as he already must have had the advanced or expert mode active for such a snapshot to be taken.
         Slic3r::GUI::wxGetApp().save_mode(comAdvanced);
@@ -5200,7 +5200,7 @@ void Plater::reslice()
 
     if (p->background_process.running())
     {
-        if (wxGetApp().get_mode() == comSimple)
+        if (wxGetApp().get_mode() == comSimple && wxGetApp().app_config->get("objects_always_expert") != "1")
             p->sidebar->set_btn_label(ActionButtonType::abReslice, _(L("Slicing")) + dots);
         else
         {
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index ba45df86c..88dd67b1d 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -100,6 +100,13 @@ void PreferencesDialog::build()
 	option = Option (def,"show_incompatible_presets");
 	m_optgroup_general->append_single_option_line(option);
 
+    def.label = L("Main GUI always in expert mode");
+    def.type = coBool;
+    def.tooltip = L("If enabled, the gui will be in expert mode even if the simple or advanced mode is selected (but not the setting tabs).");
+    def.set_default_value(new ConfigOptionBool{ app_config->get("objects_always_expert") == "1" });
+    option = Option(def, "objects_always_expert");
+    m_optgroup_general->append_single_option_line(option);
+
 	m_optgroup_paths = std::make_shared<ConfigOptionsGroup>(this, _(L("General")));
 	m_optgroup_paths->title_width = 10;
 	m_optgroup_paths->m_on_change = [this](t_config_option_key opt_key, boost::any value) {
@@ -129,12 +136,12 @@ void PreferencesDialog::build()
 		m_values[opt_key] = boost::any_cast<bool>(value) ? "1" : "0";
 	};
 
-	def.label = L("Use perspective camera");
-	def.type = coBool;
-	def.tooltip = L("If enabled, use perspective camera. If not enabled, use orthographic camera.");
-	def.set_default_value(new ConfigOptionBool{ app_config->get("use_perspective_camera") == "1" });
-	option = Option(def, "use_perspective_camera");
-	m_optgroup_camera->append_single_option_line(option);
+    def.label = L("Use perspective camera");
+    def.type = coBool;
+    def.tooltip = L("If enabled, use perspective camera. If not enabled, use orthographic camera.");
+    def.set_default_value(new ConfigOptionBool{ app_config->get("use_perspective_camera") == "1" });
+    option = Option(def, "use_perspective_camera");
+    m_optgroup_camera->append_single_option_line(option);
 
 	def.label = L("Use free camera");
 	def.type = coBool;