Crop Corner

This technique is particularly useful and makes removing skies, even where their are fine details encroaching into the sky, easy. It allows you to protect the areas you do not wish to erase, eliminating fiddly painting work. The first task is to create a history point this will allow you to paint back the original image in any areas that may be accidentally erased. Double click the photo layer (background) to turn it in to an editable layer. In the History Palette, click the box next to Make Layer, to set the history point.