Anyway, I have a picture that I'd like to remove/hide part of. It has been suggested that this can be done by using the "Crop" feature, my question is, how is this done? Please understand that I'm pretty much hopeless when it comes to using Picture/Image programs, but I sure would like to learn.

May I also say what a great program PhotoFiltre is, I've used it for some of the "simple" features that is included with it, such as transforming pictures into looking like somethig completely different, kudo's to the creator/s of such a neat program.
