It took me a while to find the "help" button for comments, and we seem to have a steady stream of people who have trouble finding it on their own. I suspect that's because it's floating off in a corner you don't have much reason to look at. Would it be difficult to move it to the immediate right of the "cancel" button, instead of the far right, and possibly rename it "formatting help"?
(I don't know enough python to look at the site's code, or I would check this out myself.)
Relabeling is a good idea - I had no idea it was for formatting help, and have thus ignored it in the past.