Adding and removing covered lifelines to and from interaction occurrences

In Unified Modeling Language (UML) sequence diagrams, you can add or remove covered lifelines to or from interaction occurrences.

You must have a sequence diagram with lifelines open in the diagram editor.
To add or remove covered lifelines to or from an interaction occurrence:
In the diagram editor, right-click an interaction occurrence; then click Covered Lifelines > Add Covered Lifeline(s) and complete one of the following steps:
Related concepts
Lifelines
Related tasks
Creating interaction occurrences
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