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If Roblox chat is not working or showing up on Windows 11/10, then try to change keyboard language, adjust Roblox privacy settings, etc.
To get or change a Roblox Display Name, you should first log in to your Account Info page under Settings, then select the edit button next to the Display Name entry above your Username.
Roblox allows all users to change their Roblox account's display name in the account settings without spending a dime. Here's how to do it.
ROBLOX allows you to change this username, as well as your Display Name. It’s important to note that there are different rules and applications of both Usernames and Display Names.
To change your Roblox username login to your account and go to the settings section. In a browser this is represented by the gear icon in the upper-right corner.