reply to an existing thread
You can reply to an existing thread in a discussion forum by clicking on the thread to enter. If the thread does not display immediately, click the Refresh button.
Once in Thread Detail view, click on the Reply button next to the title of the thread.
You will then be able to enter a subject, a message, and add an attachment to your reply. Click Submit to leave your reply.
From the Thread Detail page, you can view all the responses to the original thread by clicking through the arrows surrounding the thread name. Clicking “Parent Post” will reveal the text of the original thread that the replies correspond with.