In Unified Modeling Language (UML) sequence diagrams,
you can create lifelines to show how instances participate in interactions
between C/C++ elements.
You must have a sequence diagram open and active
in the diagram editor.
To create a lifeline:
- In the Palette, click Lifeline.
- Click an interaction frame where you want to add the
new lifeline.
- Type a name for the new lifeline (instance) followed
by a colon (:) to indicate that the type name is to be specified,
and press Enter.
A lifeline is created at the x-location where you clicked
in the interaction frame, is aligned vertically with other lifelines in
the interaction, and extends downward to cover the height of the
interaction frame.