This is a brief overview on how to Attach a file to your post. Please be aware there is a limit of 1 attachment per post.
When initially posting a new thread:
Locate the "Options" tab and click "Add/Update".
This should bring you to window where you may upload a file from a location locally, or use a link.
Your post will now contain your file attachment at the top of the post/thread.
Ooh, what does that button do?