To get an avatar from the forum gallery do the following:

Click on "User Control Panel" in the upper left corner of your screen. Select PROFILE, then EDIT AVATAR.

In the lower center of your screen you will see DISPLAY GALLERY

Click on that.

You will now see the avatar gallery.

Pick one by selecting the click circle below it, then scroll to the bottom of the screen and click SUBMIT. That is it.

If you have your own avatar on your computer you can upload it as well, or use one hosted on PHOTOBUCKET. The image must be 100X100 pixels or less and must be smaller than 7K. Use the "Upload from your machine:" and browse button to navigate and select the image on your computer, or paste the URL directly into the space for "Upload from a URL:"