Ability to zoom in and out which would be helpful for large diagrams. Ability to define the properties of a relationship (identifying, non-identifying, also cardinality). Ability to refresh the diagram after making changes to the objects. Ability to edit the objects through the diagram. This is not a complete list, but just what I can think of off the top of my head. Currently I'm having to reverse engineer the database into another application (such as Erwin or Toad Data Modeler) in order to get the visual representation of the database that I need. It would be great id I could get this functionality from within PL/SQL Developer.
Thanks.