I knew you can spray stuff on it so it wouldn't smudge & it's good to know that small tweaks can be made once it's "fixed," but anything else, you need to leave it "unfixed" until you're satisfied so you can make major changes. Thanks! I learned something new! :D That's why I like to play around digitally, it's easy to go back & tweak things, especially if you keep things on separate layers. So if I was drawing Mick, for example, his face-shape & coloring would be one layer, facial features another, clothes another, plus background. Any tweaks could then be made on a new layer (If I stupidly forget what layer I was on & put things on a layer they shouldn't be. XD), or I could go back to the layer I need & change it there. :D