In sequence diagrams, you can add create messages or destroy messages
to lifelines to represent the creation or the destruction of interaction instances.
You add a create message above any messages and interaction fragments that
are covered by the lifeline; you add a destroy message below the messages
and interaction fragments.
You must have a sequence diagram with multiple lifelines open.
To add a create or destroy message to a lifeline:
- In the Palette, click Create Message or Destroy
Message.
- Complete one of the following steps:
- To add a create message, click the source lifeline from which the
messages originates and drag it to the destination lifeline where you want
to create a new interaction instance. The head of the interaction instance
aligns with the termination point (message arrowhead) of the message.
- To add a destroy message, click the source lifeline and drag it to
the target lifeline where you want to delete the interaction instance. A destroy
message appears with a stop node (X) on the destroy message where the lifeline
terminates.
- In the name field, type a name and press Enter.