Swap | Thinner

Some of the pages on this site have links called "Swap" or "Thinner" below the image area -- I'm playing with the built-in graphics capabilities of PHP. So far the "Swap" link will cut the picture in half and swap the left and right sides, and the "Thinner" link will select a 2pixel wide segment from the center of the picture, and stretch it to double the width of the original image.

Brilliant, eh? I thought so...