How do I change my address bar back?

I pressed some button on my keyboard by accident, and it changed my entire address bar so I can't look at it unless I scroll up to the top, and I never see my task bar unless I minimize all the pages. What button do I press to change everything back to the way it originally was?How do I change my address bar back?
F11How do I change my address bar back?
I pressed some button on my keyboard by accident and it change my intire address bar unless I minimized all the pages what button do i press to change everythink back to the way it originally was