I think you are talking about adding a picture under your name. It is called an avatar. Go to your profile. Way at the bottom.
When I did mine, I put the picture on my desktop so when I had to browse for the link it was easy to find. You add that picture just like you did for your great quilt.
Then at the bottom you will have to click on the avatar update button as your last step.
Golly I hope that this makes sense. You can also go to the help listing at the top of the page for this information.
Good luck