I had the need to copy a process in order to make a similar one, and i found an option by right clicking on the process:
The work around i found is 'Notepad'!!!
- copy the source .bpmn file with a new name
- Open with Notepad and find and change the process name and id attributes with the new name and id:
Then if you Refresh the folder in Jdeveloper the new process is visible and editable.
An other issue that i have is with Sub-processes. If you expand and collapse them the layout is usually distroyed and if you generate process image it always displays expanded:
The devil in the details...