Showing operation and message signatures in UML sequence diagrams

In UML sequence diagrams, you can show the operation signatures or message signatures of individual messages to visually represent the communication in interactions.

You must have a sequence diagram open that contains messages.
To show an operation or message signature in a sequence diagram, in the diagram editor, right-click a message; then click Filters > Show Signature.
The operation or message signature is displayed in the name compartment.
Nota: If the message has no arguments, the operation signature of the message is displayed.
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