Link models

If I had a very large model and I wanted to separate areas into different models to avoid distraction and aid on screen clarity, it would be good to link tables between them. I'm starting to have problems with lines crossing other lines and having to spend more time re-arranging than actually designing. If I could separate functional areas out without actually disconnecting them, it would be awesome.

Or...tag tables and colour by tag, hide by tag, something like that.