To reply within a topic/thread:

1. If you are reading a topic/thread and would like to reply, click the blue "Reply" button located at the bottom-left of each message.
2. If you have not signed in, you are prompted to do so. If you do not have a Yahoo! ID, you can register with Yahoo! by clicking "Sign Up."
3. If you have never used Yahoo! Message Boards, you are asked to complete an alternate email address verification form. You only need to do this once.
4. After you are logged in, you are sent to the Message Reply page. Simply choose your identity, fill in the subject header for your message, type your message, and click "Post Message" to make your message public, or "Preview Message" if you would like to give your message a second look.