Ok, I'll give you a little example of what i'm doing. So lets say that I bring a sketch of a car that I drew into Photoshop. I then laso certain body parts of the car. I want to keep this selection area for use throughout my project so I don't have to keep retracing the car. So, once I've got all of the selections made, I've been saving it as an alpha channel. Then lets say I want to create a mask on the layer that the body is on to manipulate it. I've been trying to bring the alpha channel into the mask layer, so that I could only play with the portions of my sketch within the alpha channel selection area. Is this possible? Thanks again for all your help.