This is what I did for my needs. It may not be the most optimized, but it gives me the ability to determine what size crop and then shift it around to the right spot of the texture. I have a texture sample duplicated just to show what the atlas looks like prior. In the first Panner I set Speed X to 1 and Speed Y to 0. In the second Panner I set Speed X to 0 and Speed Y to 1.
