Changing the order of messages in a communication diagram in starUML seems impossible. Up until now I've been deleting all the messages and adding them back in the right order.
This seems quite a lot of trouble (even for starUML) for a relatively easy task. Is there a better way?
The answer lies in the right hand pannel, as for most things in starUML.
As you can see the messages in this panel are ordered as they're shown on screen. message1 comes before message2. However, I want the order to be different.
You can right click a message and select move up or move down respectively to change the order.
After this you have to click back into the diagram to force an update and voilla. The order of the messages is changed and your life is saved.
You can't drag the messages around in this right hand panel to change their order. Why not? I don't know... ☹️