I really like your application, I am just wondering if it is possible to assign the trackpad-scroll function to be for moving the image around instead of to move back and forth between pictures. I tried messing with the keyboard assignment configuration, but I was never able to get it to work. I don't even know how to assign a shortcut to left and right scrolling, so that's out of the picture. However, up-and-down scrolling never worked for me, either.