A fullscreen hotkey would save a lot of workflow time, even for multitaskers with lots of tabs on the go, but especially for those working in a single tab. Whatever content we're making, be it pages, posts or blasts, it's cumbersome to have to scroll up to turn off fullscreen and open new tabs or pages for files, etc. I'd suggest Ctrl+` as the hotkey, since it's not currently used by many programs.
This exists! It's control + shift + f