F11 only redirects me to self help.
there are like thousands of keys to press like fs 10 9 8 7 6 5 4 3 2 and 1 but have u tried esc its at the top right part of the keyboard
Try to use Alt+Enter. It's the standard key combination to switch between Window mode and Full Screen.
Just found the switch button by tabbing around, so thanks for the prompt, but gee, that button was hard to see. A bolder switch button would have saved me a lot of time.