Moving synchronous messages

In sequence diagrams, you can move all message types on lifelines. However, when you move a synchronous message with a return message, you must move the send message and the return message separately and in a particular order; otherwise, only one part of the message moves on the lifeline.

To move a synchronous message:
  1. Open a sequence diagram that contains multiple lifelines with at least one synchronous message.
  2. In the interaction frame, click a synchronous message.
  3. Complete one of the following steps:
    • To move the message up the lifeline, first drag the send message to the new target location and then drag the return message.
    • To move the message down the lifeline, first drag the return message to the new location and then drag the send message.
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