As far as I know, there are only three codes that actually work in comics. , and . being italics, is underline and is self-explanatory. The text in the comics is already bold, so there's no point in trying to further bold it, and I stupidly pointed out a while ago that would make your text normal. Brad killed that double-quick.
There may be color possibilites too. Not sure though.
--- Do you want ants? Because that's how you get ants.