Creating a Message

Use the Message tool (or, in a sequence diagram, the Self Message, Procedure Call Message, or Self Call Message tool) in the Toolbox.

Select Model > Messages to access the List of Messages, and click the Add a Row tool.

Right-click the model (or a package) in the Browser, and select New > Message.

Open the property sheet of an instance link (in a communication diagram), click the Messages tab, and click the Create a New Message tool.