Posting a picture is a piece of cake. Use the "Post Reply" radio button below the last posting to the thread. That will take you to a screen with a number of options. Two boxes below the "Your Reply" box is the "Attach File" box. Click the browse button to find your jpg file on your drive. Double click that file and it will fill in the blank for attachment. Then just click the "Submit Reply" button, and it should go just fine. Preferably, the photo should be about 6"x4", or close. If your photo is larger hopefully you have an editing program to adjust the size.