Crop to center the selection

This script crops the image so that the current selection winds up at the center of the image. It is especially useful when postprocessing digital images: When the subject of a photograph appears off-center, simply select the subject, click on Script-Fu/Selection/Center Selection..., optionally customize the script's parameters (described below), et voilà—the subject is now perfectly centered.

Script options give you the choice of centering horizontally and/or vertically and of preserving the original image's aspect ratio. That last option is useful if you have, say, a 1920×2880 image and you want to professionally develop it onto 4×6" paper (a common size in the U.S.). The Preserve aspect ratio option ensures that original image's 2:3 aspect ratio remains after cropping.