I think I accidentally found a hidden feature in the editor O_o

[Qwertygiy]

So I was working on a script, and because tab won't work in Firefox, I was Ctrl+V'ing in some spaces to make it easier to read where the functions were and stuff. And somehow, I managed to pull up a little text window with scrolls and it had a list of Lua commands in it, like "and or elseif break" and stuff. I have no idea how I did it except that I was pushing buttons near the left Ctrl key and the V key and also right-clicking near the word "end".