Setting an avatar and a nickname
You can set an avatar and a nickname that other chat participants will see in a chat box next to your messages.
Note
Other chat participants will see your avatar in a chat box, if they enabled the Show avatars in chat window parameter under 
Chat configuration.
You can set your avatar and nickname:
If you do not customize a nickname and an avatar, other chat participants will see your first name and the user icon 
in a chat box next to your messages.