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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.
The process for changing your display name on Roblox is fairly simple. Here's a full breakdown of how you can change your display name in Roblox.
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.
How to change my Roblox password If you've forgotten your password you just need to click the Forgot your username/password? link on the Login page.