How can i change my nickname in chatting?

when i was setting yahoo messenger up and added a contact and they asked for nickname i thought they were asking for a nickname for the contact so now when we chat it looks like he is chatting with himself because i was supposed to put a nickname for...

Hello everybody, help me! Before, when I chat with my friend, I keep all chatting under my nickname thuhuyen05.But now, I cant keep any chatting under this nickname.if i use my YM in same computer, under other nick, I can keep all chatting. I dont have...

when im chatting with my friends, there's a nickname appear. for example, julia345 : hii so, how can i change "julia345" to another name?

In a instant message or when chatting in a chat room it uses my full name and i dont want that i want a nickname. In the old messenger it would be ur yahoo id like bob_20:..... well mine has my full name and i want to change it but don't know how.

My screen name when I chat through messenger comes up as my full name!! How do I change that? When I'm chatting in games or something it's either my nickname or my screen name, but through messenger it's my real name.

I want to change my nickname that is displayed in the chat rooms, but when I click "Change My Nickname" under chat, it opens a window but says "The requested service is not available" and I know it has been like this for years and...

i want to change my nickname for yahoo chat. when i click "change nickname". page appears saying: this service is not available. How i change my nickname?