To change your profile image, click the Edit button on your profile page:
You'll then have the option to upload a profile image. When finished editing your profile, be sure to press the Save button to make your changes take effect!
Automatic Profile Images
If you haven't uploaded a profile image directly, Koan will attempt to automatically determine your profile image using the Gravatar service.
Gravatar is a centralized profile image service attached to your email address. Visit Gravatar and create a Gravatar associated with the email address you use in Koan. Then, the next time you log into Koan, your Gravatar will be automatically used.