Refactoring tools for sequence diagram

[Geert Bellekens]

I'm currently refactoring some way too large sequence diagrams into separate operations with smaller sequence diagrams.
And I must say, it is a painstakingly slow process of copy/pasting some parts, and manually adding other parts of the original sequence diagram to the smaller new sequence diagrams.

It would be great to have refactoring tools such as "extract to new operation" or something like that.
In tools such as Visual Studio and Eclipse this is standard functionality.

Anyone have a solution for me? (addin or standard EA functionality)

Geert