Forum function, layout, and programming (define category, topic, post, reply, chat, manual unpin, selected text options, how to set your flair (and why), badges (and why, unlocks), how to request a forum group/role, clickable progress bar (right on desktop, bottom on mobile), quote by highlighting, drafts are automatically saved, mention with @ (a specific user, or any group that you are in), top left navigation (user account, search, chat, language, and notifications), bottom of post navigation (edit, delete, reply, bookmark, copy link, flag, translations), post tracking (what is it, how, why) and watching,