Working With Model Items and Diagrams > Working with diagrams > Checking diagrams > Checking a diagram
  
Checking a diagram
You can check that a diagram is consistent with the rules specific to each diagram type. It is recommended that you check your diagram after each editing session.
To check a diagram:
1. Right click the diagram you want to check.
2. From the context menu, point to Report, and then click Consistency.
The results of the report are displayed in the Output pane.