Click your user name and select My Profile, then Edit
Note: You can also select View My Profile from the My Profile dashlet.
Enter all the details that you want to show in your profile, including a picture if you
want, then click Save Changes.
Note: If you already had a profile photo, uploading a new one overwrites it.
If you enter a Google Username it will be used as the default account when you edit or create Google Docs.
- Click Home and you can see the updated details in the My Profile dashlet.
This video show you how to edit your user profile.