I've been looking around for information about this, and haven't found a guide involving it or gotten an answer, though to be fair I'm multitasking so I might've missed something, but I figured I'd just post this up and get the answer.

All of my experience with forums is really on InvisionFree boards, and the coding that I used there in order to alter things like font style, font size, etc, don't seem to work anywhere I've tried here so far. I've seen people changing things like that in their bio profiles, signatures, posts, and even their title underneath their username, yet there's nothing for it listed with the rest of the tools when making a post, so I'm wondering what the code actually is for this sort of thing.