How to split a class diagram?

[Carlos Fernandes]

Hello.

I've added a project to EA thru reverse engineering.
Some class diagrams look really bad, with a lot of lines crossing each other.

How can I split the diagrams into two or three?
Also, I'd need to repeat classes in both diagrams for it to make sense.
I haven't been able copy a class and paste it into other diagram.

Help?

Thanks.

[Eve]

I haven't been able copy a class and paste it into other diagram.

Have you tried Ctrl+C, Ctrl+V?