diff -r f8c66edffbd4 -r 5f685bcd3ad6 dialogs/SFCTransitionDialog.py
--- a/dialogs/SFCTransitionDialog.py	Thu Apr 11 08:40:17 2019 +0200
+++ b/dialogs/SFCTransitionDialog.py	Thu Apr 11 11:26:47 2019 +0200
@@ -156,7 +156,7 @@
                                 control.ChangeValue(type_value)
 
         # Refresh preview panel
-        self.DrawPreview()
+        self.RefreshPreview()
 
     def GetValues(self):
         """
@@ -202,7 +202,7 @@
                 control.Enable(radio.GetValue())
 
         # Refresh preview panel
-        self.DrawPreview()
+        self.RefreshPreview()
         event.Skip()
 
     def OnReferenceChanged(self, event):
@@ -210,7 +210,7 @@
         Called when SFC transition reference value changed
         @param event: wx.ComboBoxEvent
         """
-        self.DrawPreview()
+        self.RefreshPreview()
         event.Skip()
 
     def OnInlineChanged(self, event):
@@ -218,7 +218,7 @@
         Called when SFC transition inline value changed
         @param event: wx.TextEvent
         """
-        self.DrawPreview()
+        self.RefreshPreview()
         event.Skip()
 
     def OnPriorityChanged(self, event):
@@ -226,7 +226,7 @@
         Called when block inputs number changed
         @param event: wx.SpinEvent
         """
-        self.DrawPreview()
+        self.RefreshPreview()
         event.Skip()
 
     def DrawPreview(self):