was working on my PCB layout and must have clicked something unintentionally. The background changed from black to "hazy" (medium gray-ish) and a DRC errors are now occurring. What state is this thing in and how do I get out of it?  It looks like it's confined to one layer. I can see the traces I had on that layer. If I isolate that layer to look at it I see my traces plus the gray background. I'm just not sure what "state" it's in. ADDENDUM/RESOLUTION; Not sure what it was, but I was able to go to that layer, just click on a blank grey spot, and hit the Delete key. It went away. :)