Creating an Activity Diagram

You can create an activity diagram in an existing OOM in any of the following ways:

Right-click the model in the Browser and select New > Activity Diagram.
Right-click the background of any diagram and select Diagram > New Diagram > Activity Diagram.

To create a new OOM with an activity diagram, select File > New Model, choose to create an object-oriented model from the Model type list, choose Activity Diagram as the first diagram, and click OK.