Ah, an example would be a Warrior thats s/s spec... And wants to hit more, so he would respec to 2h. To use a single skill repsec you do /respec <skillname> I believe.... And for a full respec it's /respec all, or /respec full. You also get realm point respecs. Thats /respec realm, I believe. Correct me if I'm wrong=)