diff --git a/resources/icons/empty_icon.png b/resources/icons/empty_icon.png
new file mode 100644
index 0000000000..2dd8f0afe1
Binary files /dev/null and b/resources/icons/empty_icon.png differ
diff --git a/src/slic3r/GUI/Field.cpp b/src/slic3r/GUI/Field.cpp
index 554350b684..7cc533772b 100644
--- a/src/slic3r/GUI/Field.cpp
+++ b/src/slic3r/GUI/Field.cpp
@@ -2,6 +2,7 @@
 #include "GUI_App.hpp"
 #include "I18N.hpp"
 #include "Field.hpp"
+#include "wxExtensions.hpp"
 
 #include "libslic3r/PrintConfig.hpp"
 
@@ -493,13 +494,15 @@ void SpinCtrl::propagate_value()
 }
 
 void Choice::BUILD() {
-	auto size = wxSize(wxDefaultSize);
+    wxSize size(15 * wxGetApp().em_unit(), -1);
 	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
 	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
 
 	wxBitmapComboBox* temp;	
-	if (!m_opt.gui_type.empty() && m_opt.gui_type.compare("select_open") != 0)
-		temp = new wxBitmapComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size);
+    if (!m_opt.gui_type.empty() && m_opt.gui_type.compare("select_open") != 0) {
+        m_is_editable = true;
+        temp = new wxBitmapComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size);
+    }
 	else
 		temp = new wxBitmapComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size, 0, nullptr, wxCB_READONLY);
 
@@ -511,14 +514,14 @@ void Choice::BUILD() {
 	else{
 		for (auto el : m_opt.enum_labels.empty() ? m_opt.enum_values : m_opt.enum_labels) {
 			const wxString& str = _(el);//m_opt_id == "support" ? _(el) : el;
-            temp->Append(str/*, *m_undo_bitmap*/);
+            temp->Append(str, create_scaled_bitmap("empty_icon.png"));
 		}
 		set_selection();
 	}
 // 	temp->Bind(wxEVT_TEXT, ([this](wxCommandEvent e) { on_change_field(); }), temp->GetId());
  	temp->Bind(wxEVT_COMBOBOX, ([this](wxCommandEvent e) { on_change_field(); }), temp->GetId());
 
-    if (temp->GetWindowStyle() != wxCB_READONLY) {
+    if (m_is_editable) {
         temp->Bind(wxEVT_KILL_FOCUS, ([this](wxEvent& e) {
             e.Skip();
             if (m_opt.type == coStrings) return;
@@ -540,6 +543,8 @@ void Choice::BUILD() {
 void Choice::set_selection()
 {
 	wxString text_value = wxString("");
+
+    wxBitmapComboBox* field = dynamic_cast<wxBitmapComboBox*>(window);
 	switch (m_opt.type) {
 	case coFloat:
 	case coPercent:	{
@@ -554,13 +559,13 @@ void Choice::set_selection()
 		}
 //		if (m_opt.type == coPercent) text_value += "%";
 		idx == m_opt.enum_values.size() ?
-			dynamic_cast<wxBitmapComboBox*>(window)->SetValue(text_value) :
-			dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(idx);
+			field->SetValue(text_value) :
+			field->SetSelection(idx);
 		break;
 	}
 	case coEnum:{
 		int id_value = static_cast<const ConfigOptionEnum<SeamPosition>*>(m_opt.default_value)->value; //!!
-		dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(id_value);
+        field->SetSelection(id_value);
 		break;
 	}
 	case coInt:{
@@ -574,8 +579,8 @@ void Choice::set_selection()
 			++idx;
 		}
 		idx == m_opt.enum_values.size() ?
-			dynamic_cast<wxBitmapComboBox*>(window)->SetValue(text_value) :
-			dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(idx);
+			field->SetValue(text_value) :
+			field->SetSelection(idx);
 		break;
 	}
 	case coStrings:{
@@ -589,8 +594,8 @@ void Choice::set_selection()
 			++idx;
 		}
 		idx == m_opt.enum_values.size() ?
-			dynamic_cast<wxBitmapComboBox*>(window)->SetValue(text_value) :
-			dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(idx);
+			field->SetValue(text_value) :
+			field->SetSelection(idx);
 		break;
 	}
 	}
@@ -608,9 +613,10 @@ void Choice::set_value(const std::string& value, bool change_event)  //! Redunda
 		++idx;
 	}
 
+    wxBitmapComboBox* field = dynamic_cast<wxBitmapComboBox*>(window);
 	idx == m_opt.enum_values.size() ? 
-		dynamic_cast<wxBitmapComboBox*>(window)->SetValue(value) :
-		dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(idx);
+		field->SetValue(value) :
+		field->SetSelection(idx);
 	
 	m_disable_change_event = false;
 }
@@ -619,6 +625,8 @@ void Choice::set_value(const boost::any& value, bool change_event)
 {
 	m_disable_change_event = !change_event;
 
+    wxBitmapComboBox* field = dynamic_cast<wxBitmapComboBox*>(window);
+
 	switch (m_opt.type) {
 	case coInt:
 	case coFloat:
@@ -640,11 +648,11 @@ void Choice::set_value(const boost::any& value, bool change_event)
         if (idx == m_opt.enum_values.size()) {
             // For editable Combobox under OSX is needed to set selection to -1 explicitly,
             // otherwise selection doesn't be changed
-            dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(-1);
-            dynamic_cast<wxBitmapComboBox*>(window)->SetValue(text_value);
+            field->SetSelection(-1);
+            field->SetValue(text_value);
         }
         else
-			dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(idx);
+			field->SetSelection(idx);
 		break;
 	}
 	case coEnum: {
@@ -674,7 +682,7 @@ void Choice::set_value(const boost::any& value, bool change_event)
 			else
 				val = 0;
 		}
-		dynamic_cast<wxBitmapComboBox*>(window)->SetSelection(val);
+		field->SetSelection(val);
 		break;
 	}
 	default:
@@ -706,8 +714,9 @@ void Choice::set_values(const std::vector<std::string>& values)
 
 boost::any& Choice::get_value()
 {
-// 	boost::any m_value;
-	wxString ret_str = static_cast<wxBitmapComboBox*>(window)->GetValue();	
+    wxBitmapComboBox* field = dynamic_cast<wxBitmapComboBox*>(window);
+
+	wxString ret_str = field->GetValue();	
 
 	// options from right panel
 	std::vector <std::string> right_panel_options{ "support", "scale_unit" };
@@ -717,7 +726,7 @@ boost::any& Choice::get_value()
 
 	if (m_opt.type == coEnum)
 	{
-		int ret_enum = static_cast<wxBitmapComboBox*>(window)->GetSelection(); 
+		int ret_enum = field->GetSelection(); 
 		if (m_opt_id == "top_fill_pattern" || m_opt_id == "bottom_fill_pattern")
 		{
 			if (!m_opt.enum_values.empty()) {
@@ -746,8 +755,9 @@ boost::any& Choice::get_value()
             m_value = static_cast<SLAPillarConnectionMode>(ret_enum);
 	}
     else if (m_opt.gui_type == "f_enum_open") {
-        const int ret_enum = static_cast<wxBitmapComboBox*>(window)->GetSelection();
-        if (ret_enum < 0 || m_opt.enum_values.empty() || m_opt.type == coStrings)
+        const int ret_enum = field->GetSelection();
+        if (ret_enum < 0 || m_opt.enum_values.empty() || m_opt.type == coStrings ||
+            ret_str != m_opt.enum_values[ret_enum] && ret_str != m_opt.enum_labels[ret_enum] )
 			// modifies ret_string!
             get_value_by_opt_type(ret_str);
         else 
diff --git a/src/slic3r/GUI/Field.hpp b/src/slic3r/GUI/Field.hpp
index 457807afaa..128d60d47b 100644
--- a/src/slic3r/GUI/Field.hpp
+++ b/src/slic3r/GUI/Field.hpp
@@ -352,6 +352,11 @@ public:
 	wxWindow*		window{ nullptr };
 	void			BUILD() override;
 
+    /* Under OSX: wxBitmapComboBox->GetWindowStyle() returns some weard value, 
+     * so let use a flag, which has TRUE value for a control without wxCB_READONLY style
+     */
+    bool            m_is_editable { false };
+
 	void			set_selection();
 	void			set_value(const std::string& value, bool change_event = false);
 	void			set_value(const boost::any& value, bool change_event = false);
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 7a3d6f13a5..b614572261 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -506,7 +506,7 @@ Tab* GUI_App::get_tab(Preset::Type type)
 {
     for (Tab* tab: tabs_list)
         if (tab->type() == type)
-            return tab;
+            return tab->complited() ? tab : nullptr; // To avoid actions with no-completed Tab
     return nullptr;
 }
 
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 060eb13833..b3580a285b 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -257,6 +257,7 @@ void Tab::create_preset_tab()
 	// Initialize the DynamicPrintConfig by default keys/values.
 	build();
 	rebuild_page_tree();
+    m_complited = true;
 }
 
 void Tab::load_initial_data()
diff --git a/src/slic3r/GUI/Tab.hpp b/src/slic3r/GUI/Tab.hpp
index 7ef066963e..2f8cec1de9 100644
--- a/src/slic3r/GUI/Tab.hpp
+++ b/src/slic3r/GUI/Tab.hpp
@@ -204,6 +204,8 @@ protected:
     void                set_type();
 
     int                 m_em_unit;
+    // To avoid actions with no-completed Tab
+    bool                m_complited { false };
 
 public:
 	PresetBundle*		m_preset_bundle;
@@ -226,6 +228,7 @@ public:
 	wxString	title()	 const { return m_title; }
 	std::string	name()	 const { return m_name; }
     Preset::Type type()  const { return m_type; }
+    bool complited()     const { return m_complited; }
     virtual bool supports_printer_technology(const PrinterTechnology tech) = 0;
 
 	void		create_preset_tab();