When I want to PM someone, I usually click their name or visit their profile page. Upon visiting either one I click the little PM icon, in which pops up the quick PM. In almost every case I'm sending a member a PM to include something he/she ordered, which requires a PM attachment upload.
However, the quick PM has no way to upload or go to the full editor. So I must then remember their username, go to the Messenger, compose a new message, type it out.
Is it too difficult to add a simple "Go Advance", "Use Full Editor" or something along those lines in the quick PM pop up, that can send the current data in the textbox, or skip it into the main large PM editor box.