I discovered that in Intellij I can create nice class diagrams by going to New > Diagram > Java Class Diagram. I can do everything that I want to do, except figure out how to save the diagram after I'm done. When I create a diagram, save it, shut down Intellij, and then start it up again, I see that the diagram that I had just "saved" has reverted to a generic window displaying all of the packages in my project. I realize that I can save the diagam in a PNG format, but I don't want to do that. I want to be able to save it in an editable format? Thoughts?
The top left save disk does nothing. The right save disk will actually save the diagram.