I have a image on my Photoshop I am creating it is starting with a 4x4 circle I have it on a larger canvas so I can work with it when I save it to a pad for later work and reopen it the image size has change to 8x8 what am doing wrong or what can I do to so to keep the size I want while working on a large canvas because when I resize it back to what I need it go's smaller then what I need based on the canvas size