There is an effect called pan and zoom. Apply this to a clip in your timeline. Go into the effect editor and click on the minus sign in the upper left corner. Choose your hi res graphic, and it will allow you bring it in higher res, and do moves on it. This is the best Avid only way of doing it.
There is a plugin from stagetools.com that does it better, but costs.
I believe there is also a BCC effect that does it as well.