Messages can be created in just a few steps. In communication diagrams you can create labeled messages by simply selecting the message style and stamping the message onto your diagram complete with label. The only additional step is editing the label text. Once created in this fashion, the label remains attached when you move the message, plus you can adjust it as you like.

You can also create messages by selecting the message style from the style bar and then clicking at the starting point and ending point as you would any other path style. However, unlike most other path styles, Message path styles know to automatically add an attached label for convenience.