DirtFarmer wrote:
The problem with that approach is aligning the two images in different windows if you need to look at a small area.
The key is making two images into an animated GIF. I'm sure that can be done in programs other than Photoshop but I haven't tried it yet.
I know I can make animated GIFs with my old Photo Impact Pro module, but I have no idea how large the images it can handle. Haven't used it in years. I bought the program YEARS ago for a thing I was doing for one website I built. Needed an animated GIF.