Well, when you look below each "New post", it'll show a "QQCode Cheatsheet"

The 'Hider' one is what you are talking about. You can use any of those below to make your RP look pretty. XD

Though, warning... it's not fleshed out real well. You may or may not run into some issues. My advice, would just use them and get used to how they work and what breaks them. XD