Repositioning lifelines

In Unified Modeling Language (UML) sequence diagrams, you can move a lifeline to reposition the instance’s activity in an interaction frame. Although the horizontal order of a lifeline does not have semantic value in the project, you can move the lifeline horizontally to position it in a location that makes the diagram easier to read.

You must have a sequence diagram with lifelines open in the diagram editor.
To reposition a lifeline, in the diagram editor, click a lifeline and complete one of the follow steps:
  • To move the lifeline left or right, drag the selected lifeline horizontally to a new location in the interaction frame.
  • To reorder the lifeline, drag the selected lifeline horizontally across other lifelines to a new location in the interaction frame.
Related concepts
Lifelines
Related tasks
Creating lifelines
Deleting lifelines
Specifying class names and types for lifelines
Terminating lifelines with stop nodes
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