diff --git a/Documents/proto/messaging_extension/interaction_diagram.uml b/Documents/proto/messaging_extension/interaction_diagram.uml
index cfb2254..889465d 100644
--- a/Documents/proto/messaging_extension/interaction_diagram.uml
+++ b/Documents/proto/messaging_extension/interaction_diagram.uml
@@ -1,23 +1,19 @@
 @startuml
-note
-	Appointment
-endnote
+mainframe Appointment
 start
-:Asking Apointment]
+:Asking Appointment]
 repeat
 if (accepted) is (yes) then
 	:Export to calendar]
 	stop
 else (no)
-	:Propose new apointment]
+	:Propose new appointment]
 endif
 	
 @enduml
 
 @startuml
-note
-	Messaging
-endnote
+mainframe Messaging
 start
 split 
 	:Create Discution]
@@ -31,10 +27,7 @@ stop
 @enduml
 
 @startuml
-note 
-	Forum
-endnote
-
+mainframe Forum
 start
 :Forum Creation]