When you crop a photo in Album, by default, it saves the cropped version under a new file name and hides the original photo. Sometimes you want to crop a photo for creative effects, but you don't want the original to be hidden. In this situation, you can duplicate the item before cropping, and your original will still be available from the photo well.
Of course, this means you will be left with three versions of the file on disk: your original, a copy of the original (with -copy appended to the file name), and the cropped version (with -copy_editied appended to the file name). To conserve disk space, you can right click on the cropped version and choose "Replace Original with Edited."
