(1) When they are displayed, the InteractionOperand and name fields are hidden behind other elements in the diagram so you cannot read them. See attachment.
(2) When I nest Combined Fragment objects it becomes impossible to select inner Combined Fragment objects to move them around.
(3) I cannot add a new Message inside a Combined Fragment object. I get an error: Invalid Message.
Maybe I just don't understand Combined Fragment objects well enough so I am confused how to use them within a Sequence Diagram? I am new to UML Sequnce Diagrams.
Please advise,
Thank You!
-Wes