For diagrams there is in the tree view the context menu entry "duplicate" available, which create a duplicate of the selected diagram. Unfortunally duplicating a state diagram does not work. Reproducible: Always Steps to Reproduce: 1. start umbrello 2. add a state diagram and some widgets 3. select the diagram in the tree view, press right mouse button and select duplicate Actual Results: An error message is displayed saying that the object in the clipboard have the wrong type. Expected Results: A duplicated diagram should be added to the tree view.
Thank you for the bug report. As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists. If this bug is no longer persisting or relevant please change the status to resolved.