If you are creating a new thread (starting a new line of conversation), click the "Thread" button (see example below). If you want to reply to a post, click the "Reply" button in that particular post.
Whether you are posting a reply to an existing thread or starting a new thread, the process is the same. Much like creating an email, there is a subject window and a message window.
For longer messages, it's best to first type your messages in a word processing program (such as Microsoft Word), then copy and paste the text into the Message window. This way, not only can you check your spelling and grammar before posting, but you can also save a backup copy of your message, in case you get disconnected while adding your post.
To post your message, click the Submit button at the bottom right of the page.
