Thanks, BK,because your response led me to the answer. On my windows keyboard F11 hides or returns the main menu at the top of the page, and gives or takes away the full screen. That's the key I wanted. By seaching and finding out that's called the main menu, I found out that's F4 on a Chromebook keyboard. I tried and it works. So, thanks. I really like having that option back.Sometimes the little things are hard to figure out.