I don't see why the typical shrunken-image with link to larger size doesn't work? You can only put so much on a small screen, and if zooming + panning doesn't w

I don't see why the typical shrunken-image with link to larger size doesn't work? You can only put so much on a small screen, and if zooming + panning doesn't work, and the author's / publishers don't want to make multiple representations for different sized devices (really just one for small and one for large) - what else would work?