How to "link" 2 dimmers with vera Edge

I’ve recently switched my controller from a raspberry+razberry to a Vera Edge. Most things seem to work fine, but there’s one thing I can’t figure out. In my old controller I was able to “link” two dimmers together, so that when I set one to 50% (using the wall button) the other one would go to 50% too.

I guess such a thing would be possible with the edge too, but I just can’t figure out how. Any idea’s?