I have a (possibly silly) question please.

[captain fantastic]

Hi all. When I want to reply to somebody's post, do I press "Reply" or "Quote"? When I pressed reply, it seemed as though it might be sent as a PM to the individual member. When I pressed quote, nothing really happened. (Or so it appeared to me).  So how do you just quote and reply to another poster the same way we did on Trademe? 

Sorry I know this sounds like a dumb question, but it's all a learning experience.