In sequence diagrams, you can create lifelines to represent participants and to show the chronological order of their interactions.
Adding lifelines
In sequence diagrams, you can add a lifeline to show the participant in an interaction.Moving lifelines
In sequence diagrams, you can move a lifeline to reposition it horizontally in an interaction frame.Deleting lifelines
In sequence diagrams, you can delete a lifeline to remove a participant from an interaction.
Parent topic: Modeling interactions by using sequence diagrams
Related concepts
Sequence diagrams
Interaction frames
Lifelines