Place a UML2 element to create a lifeline
You can create a lifeline and connect it with a UML2 element in one operation.
Procedure. Procedure
In the Explorer navigation or diagram navigation, click a UML2 element and hold down the mouse button.
Drag the UML2 element to the sequence diagram.
Release the mouse button to drop the UML2 element.
A lifeline is created and connected with the UML2 element. Alternatively, you can use Copy/Paste.