Avatars - WordPress
From Help Wiki
Personal Avatar
Your personal or "user" avatars will appear whenever you leave comments, post in the forums and when your popular posts are displayed around the site. Don't worry about cropping your image first, WordPress will let you crop your image after you upload it.
To change your personal avatar:
- From the Dashboard go Users > Your Avatar
- Click the Browse and locate your image (.jpg, .gif or .png) on your hard drive
- Click Upload
- Drag the anchors around the portion of the image you want to use and click Crop Image