I need help. When I choose adjustment brushes and adjust exposure and other things, then brush it onto the photo, it does not show up on the photo. It only shows up on the image navigator image after I apply it. I cannot see brush strokes as I apply them on the image at all, it looks like I am doing nothing, and then I can see my adjustments in the navigator image on the top left. HELP! I have tried uninstalling and reinstalling lightroom and nothing works. I've been using lightroom for 6 years and have never had this issue.