diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 62cd73799..9ee96b722 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -685,8 +685,20 @@ void Sidebar::priv::sync_extruder_list()
     auto printer_tab = dynamic_cast<TabPrinter *>(wxGetApp().get_tab(Preset::TYPE_PRINTER));
     printer_tab->set_extruder_volume_type(0, NozzleVolumeType::nvtBigTraffic);
     printer_tab->set_extruder_volume_type(1, NozzleVolumeType::nvtNormal);
-    AMSCountPopupWindow::SetAMSCount(0, 0, 0);
-    AMSCountPopupWindow::SetAMSCount(1, 1, 1);
+    MachineObject *obj = wxGetApp().getDeviceManager()->get_selected_machine();
+    if (obj == nullptr) {
+        MessageDialog dlg(this->plater, _L("Please select a printer in 'Device' page first."), _L("Sync extruder infomation"), wxOK);
+        dlg.ShowModal();
+        return;
+    }
+    int left = 0, right = 0;
+    for (auto ams : obj->amsList) {
+        // Main (first) extruder at right
+        if (ams.second->nozzle == 0) ++right;
+        else ++left;
+    }
+    AMSCountPopupWindow::SetAMSCount(0, left, obj->vt_slot.size() > 1);
+    AMSCountPopupWindow::SetAMSCount(1, right, 1);
     AMSCountPopupWindow::UpdateAMSCount(0, m_left_ams_count);
     AMSCountPopupWindow::UpdateAMSCount(1, m_right_ams_count);
 }
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 8dd047e76..3b0d282e1 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -3926,6 +3926,7 @@ void TabPrinter::build_unregular_pages(bool from_initial_build/* = false*/)
                 //    }
                 //}
 
+                on_value_change(opt_key, value);
                 update_dirty();
                 update();
             };
@@ -5010,6 +5011,8 @@ bool Tab::tree_sel_change_delayed(wxCommandEvent& event)
         // update_undo_buttons();
         this->OnActivate();
         m_parent->set_active_tab(this);
+        m_main_sizer->Show(m_extruder_switch, !m_active_page->m_opt_id_map.empty());
+        GetParent()->Layout();
 
         m_page_view->Thaw();
         return false;