Using UML Designer, it's possible to add a class from another package to another package class diagram?
I have two packages: pacakge1 and package2, in package1 I have one class MyClass, I want to add this class MyClass to a diagram class into package2, it's possible?
You may have already sovled the problem, since it's been long since asked.
You can click the green plus icon and get "Add existing elements" window, in which on can select elements to be placed in the diagram when you select "all elements".