You can add existing (or shared) use-case and actor artifacts that contain textual use-case specifications; these artifacts can be reused in multiple diagrams. You can also add use-case and actors elements that function as placeholders; these placeholder elements cannot be reused in other diagrams. For more information, see Use cases.
For process guidance on creating use cases or actors, select a use case or actor in the diagram and click
.To watch a movie that shows you how to create a use-case diagram, click here.