All users can post a Profile2 image. This image is displayed to others in a site's Roster tool and is attached to all of your posts in the Forum tool.
This displays your Profile2 information page.
This displays a Browse button.
This returns the display to the Profile2 picture panel with the image file listed.
This uploads the image to your Profile2.
Under Profile2 / Preferences, do not checkmark "Use my gravatar as my profile image".