Here’s how:

Click the Messenger menu and click My Display Image.

Make sure “Share my Avatar” is selected, then click Customize.

This opens your avatar web page. You may be asked to sign in again to verify that you are, in fact, you!

On this page you’ve got all kinds of options for changing your avatar. Hair. Glasses. Backgrounds. To pick a mood, click one of the emoticons above your Avatar. And be honest! :o)

To quickly change your avatar’s mood from within Messenger, right-click your avatar at the top of the Messenger window, next to your name.

Pick a mood from the Set My Avatar Mood To menu.