To display the Add submenu, either click on the element in the Project Browser and press [Insert], or right-click on the element and select the Add context menu option.
The Add sub-menu enables you to:
- Add a Behavior element (Activity, Interaction or State Machine) and one of its associated diagrams to the selected Classifier element
- Add a Rule Flow Activity element to a Class, in Business Rule Modeling
- Create a diagram to explain or expand on the selected Classifier element, using the New Diagram dialog, or
- Create a connector to another element.
Elements such as Actors, Classes and Activities can define a large amount of information that can be conveniently represented by or expanded in a child diagram. The Add sub-menu for these elements provides all of the options listed above.
Other elements, such as Timing, Exit and History have much more specific functions that do not require expansion. Therefore, the Add sub-menu for these elements only provides the option to create a connector to another element, and does not offer options for adding child elements and diagrams.