Index: SDDs/Service.puml
===================================================================
diff -u -r1bc34c23575fe101b85c851cff245436394d7123 -r66bd45c35e31d6afc23cf062d8016260b327e623
--- SDDs/Service.puml	(.../Service.puml)	(revision 1bc34c23575fe101b85c851cff245436394d7123)
+++ SDDs/Service.puml	(.../Service.puml)	(revision 66bd45c35e31d6afc23cf062d8016260b327e623)
@@ -167,5 +167,8 @@
     UI -> US: ACT: User Modes Screen
     US -> UI: TCH: Touch professional mode switch
     UI -> SW: ACT: Set professional mode on or off
-    SW -> SW: ACT: Save configuration in System.conf
+    SW -> OS: ACT: Write configuration in System.conf
+    OS -> SW: ACT: Read configuration from System.conf
+    SW -> UI: ACT: Notify UI
+    UI -> UI: ACT: Update Sliding Switch
 @enduml