This is a old trick how to change nickname in Yahoo Messenger. I’m not sure if in the future Yahoo would change the way to change our nickname of ID of Yahoo Messenger or others. By changing nickname that would make you nickname in Chat Room of Yahoo Messenger changed into the newest one. You can change all of your Alias ID or your Main Id of Yahoo Messenger. Here are the steps:
First login to Yahoo with your ID that you wanna change it’s nickname:
After you login in just pointed your browser to the links below:
That link above would directly open the page to change nickname, age and sex of your Yahoo ID (see the picture below). Then all you have to do just click the save button. Done.
Note: You have to change youryahooid with your username or id that you want to change it’s nickname.