1. Go to the My Home page after you log in.
2. Locate the Edit Primary Pic link below your primary picture on the left. Then click the link.
3. It takes you to the Edit Picture page in Gallery where the blue Edit Picture link is displayed in a bolded font.
4. Scroll down to the bottom of the page. Locate the text "Is Main Image:" that shows the option Yes is selected.
5. Change the option to No. This picture is set to a non primary profile picture.