diff --git a/resources/localization/Slic3rPE.pot b/resources/localization/Slic3rPE.pot
index e2f4a6ec2..7e31401c4 100644
--- a/resources/localization/Slic3rPE.pot
+++ b/resources/localization/Slic3rPE.pot
@@ -2161,8 +2161,13 @@ msgid "Iso View"
 msgstr ""
 
 #. TRN To be shown in the main menu View->Top
+#: src/slic3r/GUI/MainFrame.cpp:527
+msgctxt "Layers"
+msgid "Top"
+msgstr ""
+
 #. TRN To be shown in Print Settings "Top solid layers"
-#: src/slic3r/GUI/MainFrame.cpp:527 src/libslic3r/PrintConfig.cpp:2068
+#: src/libslic3r/PrintConfig.cpp:2068
 msgid "Top"
 msgstr ""
 
@@ -2171,8 +2176,13 @@ msgid "Top View"
 msgstr ""
 
 #. TRN To be shown in the main menu View->Bottom
+#: src/slic3r/GUI/MainFrame.cpp:529
+msgid "Bottom"
+msgstr ""
+
 #. TRN To be shown in Print Settings "Bottom solid layers"
-#: src/slic3r/GUI/MainFrame.cpp:529 src/libslic3r/PrintConfig.cpp:150
+#: src/libslic3r/PrintConfig.cpp:150
+msgctxt "Layers"
 msgid "Bottom"
 msgstr ""
 
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 3a1b5d37d..4e2403914 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -2333,7 +2333,20 @@ void TabPrinter::update_pages()
     // set m_pages_(technology after changing) to m_pages
     // m_printer_technology will be set by Tab::load_current_preset()
     if (new_printer_technology == ptFFF)
-        m_pages_fff.empty() ? build_fff() : m_pages.swap(m_pages_fff);
+    {
+        if (m_pages_fff.empty())
+        {
+            build_fff();
+            if (m_extruders_count > 1)
+            {
+                m_preset_bundle->update_multi_material_filament_presets();
+                on_value_change("extruders_count", m_extruders_count);
+                wxGetApp().sidebar().update_objects_list_extruder_column(m_extruders_count);
+            }
+        }
+        else
+            m_pages.swap(m_pages_fff);
+    }
     else 
         m_pages_sla.empty() ? build_sla() : m_pages.swap(m_pages_sla);