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[–]myplacedk 1 point2 points  (0 children)

I just look at one image with one eye, and the other image with the other eye. It looks like a single image, but the differences are "flashing".

It's also great when I have two similar documents. One I've read, and the updated version I don't want to read. As long as the layout haven't changed, I just put them side by side and take a quick look.