Adding and removing covered lifelines in sequence diagrams

In sequence diagrams, you can add and remove lifelines from combined fragments or interaction uses.
You must have a sequence diagram open that contains lifelines and combined fragments or interaction uses.
To add or remove lifelines to or from a combined fragment or interaction use:
  1. In the diagram editor, right-click a combined fragment or interaction use; then click Covered Lifelines and complete one of the following steps:
    • To add lifelines, click Add Covered Lifeline(s).
    • To remove lifelines, click Remove Covered Lifeline(s).
  2. In the window, select the lifelines and click OK.
Note: When you remove a covered lifeline from a combined fragment, you also delete all the messagesĀ and interaction fragments that the combined fragment contains and that the lifeline covers.
Related concepts
Combined fragments in sequence diagrams
Lifelines in UML diagrams

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