How do I get my zoomed screen back to normal?

My screen is extremely zoomed to where I can only see one icon. I'm not able to go to start or even try to fix it because I can't see anything else at all. I've restarted it numerous times, Ive hit the zoom in and out buttons on the keyboard, and tried pinching the screen in and out...nothing! Please help me!! I don't even know how this happened!