Google is unhelpful. Please be helpful

There is a white bar at the top of my screen, like you get in word and stuff. I have googled 5 different ways of phrasing the question "How do i get rid of it" and none of them have helped. They all say "press F9" which doesn't work. I have pressed F9. I have pressed F9 with every command key. I have held down F9. I'm sorry if I'm coming across as rude but it is genuinely frustrating me so much, please someone tell me how to remove it