Deleting lifelines from UML diagrams

You can delete lifelines from UML diagrams, such as sequence or communication diagrams, to remove an object from an interaction. When you delete a lifeline, all send and receive messages that originate from the deleted lifeline are also deleted. When you delete a lifeline from a sequence diagram, all interaction fragments that cover the lifeline are deleted, but the combined fragments and interaction uses that cover other lifelines are not.
You must have a UML diagram open that contains lifelines.
To delete a lifeline, in the diagram editor, right-click a lifeline; then click Delete from Model.

All send and receive messages that originate from the deleted lifeline and all interaction fragments that cover the lifeline are deleted. The combined fragments and interaction uses that cover other lifelines are not deleted.

Related concepts
Lifelines in UML diagrams

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