@kaeshae when one opens up an RP page the first thing that one will see are three tabs, these are labeled as IC (In character. use this one when playing an OC) OOC (Out of character use this tab if want talk as yourself) and finally there's character this is where you're character sheets goes
Also the mention button is the bottom corner of a post, but if you need grab the attention of someone who hasn't posted then do this [ @ ] (without the space)