You cant...So when ur registering think of the name you really want so you wouldn't want to change ur name when you entered the game. But if you still really want to, then register again with your new name. Hope this helps ^_^
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the creator of robloxes username is builderman56
Yes, it was released in late 2013/early 2014. You can change your username at the cost of 1000 ROBUX! Just go to the 'Account' button and the 'Change Username' button should be right next to your username.
It's literally Roblox.
Its "ROBLOX"
what is usrname you roblox