Pan or zoom in the VSE I am trying to create some graphic matches on action (on either side of a transition, similar shapes are in the same place on the screen. 

To accomplish this, I have an image with some targets which I would like to keep semi-transparent so that I can scale and move my footage underneath to precisely the right position. 

I have considered pushing each clip into a separate plane on a separate screen, but I'm not sure how I would get a semi transparent overlay using this. Anyhow, it would be preferable to keep my edits within the VSE.

Any ideas?
I figured it out. Go to Add  > Effect Strip > Transform, then right click on the element that you want to transform (i.e. the x offset) and select Add Driver. Now you will be able to pan/zoom dynamically and edit this change with keyframes on the graph screen.