How to change name while chatting in chat rooms?

I hope someone can help. When chatting on like big brother and you go in with a chat name and you want to change it, I%26#039;ve seen people type in so and so is now known as so and so. (example) How do they do that???????????????????|||If you are using Yahoo Messenger 8.1.0.249 , Click on messenger/my contact details/fill in the information you want it to say/save and close, and/or add yourself to your contacts, and go to your name and change it to whatever you want. You can also click %26quot;my profiles%26quot;, then click edit on the profile you want to change, then change your ID from your name to the ID you want to use. Messenger HELP link: = http://help.yahoo.com/l/us/yahoo/messeng鈥?/a> = Messenger HELP link