In sequence diagrams, you can move a message across other messages
and interaction fragments on the same lifeline or on another lifeline to reorder
the message. After a reorder, the message number automatically indicates the
updated position on the lifeline.
To reorder a message:
- Open a sequence diagram that contains at least two lifelines with
messages.
- In the interaction frame, click a message and move it up or down
on a lifeline across other messages and interaction fragments. A
reorder occurs and the moved message appears in the new location. The messages
and interaction fragments that were below the reordered message maintain their
original position.
Restriction: - You cannot directly reorder a skewed asynchronous message. For the message
renumbering to occur, you must move the other messages around it to change
the skewed order.
- You cannot change the order between a send message and a return message.