can anyone find this keybind?

https://preview.redd.it/vgngk8qjj39h1.png?width=1920&format=png&auto=webp&s=d8ce3697e0c785219ea778a3fc90cec7d21daea8

I cannot find whatever the keybind setting for the bottom right is. I have to click to back out of a menu. Pressing ESC also just completely closes the menu so that's not it... but I cant seem to find the setting anywhere for whatever the bottom right is called.