Adding call triggers to transitions

In UML modeling, a call trigger is an event that represents the receipt of a request to invoke an operation. A transition with a call trigger initiates when the called operation is invoked.

Before you can add a trigger to a transition, you must have a state machine diagram open in the Modeling perspective.
To add a call trigger to a transition:
  1. Right-click a transition; then click Add UML > Call Trigger and complete one of the following steps.
  2. To create a new operation, click Create New Operation, type a name and press Enter.
  3. To select an existing operation, click Select Existing Element, in the Select Element window, in the list, click an operation, and click OK. Type a name and press Enter.
Related concepts
States, regions, and transitions
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