As you can see, you can create various types of messages between lifelines in a sequencediagram, and select an existing operation as a signature of the message.
如您所看到的，您可以在序列图中的生命线之间创建各种类型的消息，并选择现有的操作作为消息的标记。
2
When you double-click on a message operation signature on a sequencediagram, a list of available operations will display.
当您在序列图的消息操作签名上双击时，会出现一个可用操作的列表。
3
In addition, refactoring an operation will update the corresponding message in a Sequencediagram, even when the Sequence diagram is in a closed model.