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.