To reply to a message in a forum, first of all you need to be a members and logged in. Now you simply need to hit the Reply button in the bottom right corner of the message you wish to reply to: Reply to a message Hitting the Reply button will bring you the message form: Reply Form Let's look a the principal fields of this form: Subject: This is the subject of your message. Since your replying to a message, the letters "Re:" are inserted before the subject of the message your replying to. Message Icon: You can select a little picture that will identify your topic. For example, if you are posting a question, you could check the question mark icon. You are not required to check an image. Message: This is where you actually write what you have to say. At the end of the table, you can see 3 buttons : Preview, Submit, Cancel Post : Preview: Clicking on this button will show you how your message will be displayed. You can then edit it again after. The preview button does not actually post your message. Submit: This button saves your post in the database. A message will be displayed to thank you for your submission. Cancel Post: This cancels your message and takes you back to the forum page without saving anything.