You might find this tip useful:

When reverse engineering a project into Visio a new model is created each time, which makes round-trip engineering impossible.

Did you know that you can get around this problem to a certain extent by copying classes between models?

1) In your newly created reverse engineered model drag the classes you wish to copy from the Model Explorer onto a static structure diagram.

2) Select them all (e.g. CTLR-A) and copy (CTRL-C)

3) Open your destination model in a separate Visio instance and paste (e.g. CTRL-V).

The destination model need not be empty so it could be your master model. Always keep a back-up copy just in case though!

Tony Loton (author)
http://www.lotontech.com/visualmodeling

But you would not get the actual model elements by the workaround

I would like to know of a way to copy the class with it's structure
(generated by the Rev Engg) to another Visio Model not just the Visual diagram



Thanks for reading !