I agree. I love the auto-expand editor for simple posts, but whenever I make longer posts and want to apply formatting it becomes tedious if I want to do something else than underline, italic and bold (ctrl + u/i/b) further down in the post. Now I need to select text, scroll up, choose a style, scroll down to see how it looks, scroll up to do changes, scroll down to review again etc. Sometimes I might even be confused as to what I have currently selected and need to scroll down just to double check that. So I would want some solution here, but I personally like the auto-expand up until the point I wish to apply formatting. So a solution for me would not be to have the editor area be a fixed height. So either fixed toolbar (could be minimized until clicked or hovering some toggle button) or a toggle that would allow me to make the editor a fixed height temporarily would be preferred solutions.