Meh, this would be useful. I'd love to see it in the next GraalShop release. Opening up my graphics program (
IrfanView, in case you're interested), checking some x's and y's, closing it again, finding out that's the wrong co-ordinates, opening up the image again, getting the right ones, and finally doing the gani, gets slightly boring after a while. Being able to see, and better still select, what you want, without needing to open up a separate program, would be a great addition.