Adding and removing covered lifelines to and from combined fragments

In Unified Modeling Language (UML) sequence diagrams, you can add and remove covered lifelines to and from combined fragments to visually represent constructs in interaction instances.

You must have a sequence diagram with lifelines and combined fragments open in the diagram editor.
To add or remove covered lifelines to or from a combined fragment:
  1. In the diagram editor, right-click a combined fragment; then click Covered Lifelines > Add Covered Lifeline(s) and complete one of the following steps:
    • To add covered lifelines, in the Add Covered Lifelines window, click the lifelines to cover.
    • To remove covered lifelines, in the Remove Covered Lifelines window, click the covered lifelines to remove.
  2. Click OK.
Related concepts
Combined fragments
Lifelines
Related tasks
Creating combined fragments
Adding interaction operands to combined fragments
Removing interaction operands from combined fragments
Moving interaction operands within combined fragments
Resizing interaction fragments
Adding guard conditions to interaction operands
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