Okay So I'm trying to make a star field in Photoshop CS5. Simple enough. Open a new layer fill it in with black add noise and then adjust levels until your satisfied. Easy. Everything works just fine until I make my level adjustments. I get them to where I like the way it looks and then when I press okay it just goes back to the way it was before! So I end up with just a page of static. What's going on!?