A use case diagram can indicate its relationship to another diagram without using the hyperlinking feature. To accomplish this, place a shortcut to another diagram within the current diagram.
A diagram shortcut is represented with a package that displays the icon of the diagram type it represents and the diagram name. The package also lists the elements of the diagram. For more information regarding packages, see Working with Packages.
To add a shortcut to a use case diagram using the UML Navigator:
In the UML Navigator, select the node for the diagram you want to include on the use case diagram, and select Copy from the context menu.
Right-click on the use case diagram background and choose
Paste shortcut from the context menu.
To add a shortcut to a use case diagram using the context menu:
Right click on the use case diagram.
Select New > Shortcut from the context menu.
The Shortcuts dialog opens.
Select the appropriate diagram from the Model Elements list.
Click Add to insert the shortcut.
Click OK to close the dialog.