How do I edit a UML Activity Signal Send or Signal Receipt name?

F

fotoguru

I just started using Visio 2007 Pro to make UML diagrams.
Trying to use the "Signal Send" and "Signal Receipt" symbols, but I can't
change the name from "<no send action>" even when I edit the send actions on
the property sheet!

"Help" offers no help!
Can you?
 
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