Gray border

[Spithead051]

So my cat decided to walk across my Intel-based Macbook on the keyboard and now I have this gray border around all the edges of my screen. My mouse cant go onto it. What can I do to fix it or what is the problem? Any help is appreciated

[hitchface]

I'd imagine that your cat managed to change some video settings. I'm no expert on Macs, but cruise into the video settings menu(s) and see if your answer lies there.