I have seen it done both ways but I thought I would ask so I am doing it the right way. When replying to a PM do you;
1. Just reply below the original message, or
2. Do you go to the top and hit enter a couple time to make room to reply at the top like an e-mail.
Note I don't believe in personal preference when it comes to etiquette. There is a right way and a wrong way and the Grizz way which is the wrong way with a lot more math. I would like to do it the right way.