Adding regions to state machines and states

In UML modeling, a region is a container that holds states, pseudostates, and transitions. You can add a region to a state machine or a state. You can use regions to define nested states and transitions.

Before you can add a region to a state machine or state, you must have a UML modeling project open in the Modeling perspective.
To add regions to state machines and states, in the diagram editor, right-click a state or state machine; then click Add UML > Region.

Parent topic: Modeling object behavior by using state machine diagrams

Related concepts
State machines
States, regions, and transitions

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