You can make replies to existing messages by editing the page (click the drop down arrow on "new message" and choose "edit") or section. Replies to previous posts should be indented, and an empty line is added between the messages: This is the first message. (signature1) :This is a reply to this message. (signature2) The next reply can either be even more indented, or the replies can alternate between not indented and indented. This creates a more readable structure.