After you press the "Post Reply" button look below the reply input window and you will see the " Manage Attachments ". When you press this it will bring up another window that I will call the Browse window. Press the "Browse" button to browse your own computer and locate the picture on your system that you want to share. When you find your picture press the "OK" Button and then the "Add this File" Button. Then please be patient. You picture cannot be too big and sometimes it takes a bit to get it uploaded. So wait for that Browse window to tell you it had a problem or it was successful.