Creating execution occurrences

In Unified Modeling Language (UML) sequence diagrams, an execution occurrence is created automatically when you create a synchronous or an asynchronous message on a lifeline. You can also manually create an execution occurrence to show the start and finish behavior in an interaction.

You must have a sequence diagram with lifelines and messages open in the diagram editor.
To create an execution occurrence manually:
  1. In the Palette, click Execution Occurrence.
  2. Click the target lifeline at a position that does not have an existing execution occurrence.
Note: To created a nested execution occurrence, click the target lifeline at a position that has an existing execution occurrence.

Parent topic: Adding execution occurrence to interactions

Related concepts
Execution occurrences

Related tasks
Resizing and reordering execution occurrences

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