(How does cropping figure into all this? Almost every
one of my uploads
is cropped, sometimes by quite a lot. Does anybody really want multiple
megabytes of out-of-focus background shrubbery? :-) )
Sometimes you want to adjust the aspect ratio of an image (say to make
it fill the width of a wide taxobox without taking up too much height).
If you don't have an orginal with plenty of background to work on this
is much harder (since you would have to create more background or lift
the foreground image onto a new background).