Wanna change that yellow circle with the question mark to something that represents YOU? You can upload from your computer a pic of yourself OR any image (as long as you have “rights”) that you want to represent you.
Just click on “Change My Photo” on your page. You'll be taken to"My Settings - Profile." Next to the "Profile Photo" field, click the "Upload a photo" button. Click the "Browse" button to find your image on your computer.