Go to "user cp" at the top of the page. CP stands for Control Panel. After you click on user cp, another page will launch. On the left side of that new page, there is a column of options titled Control Panel. Look down the column and you will see "edit avatar". Click on that and a new page will launch with instructions on how to post the picture (avatar) next to your name. Hope that helps. PS. You need to follow the instructions carefully, especially the photo size limitations.
