In the top left corner near your profile picture you can see your current username:
You can change your username by tapping on it in your "Me" tab.
Your account will use the new username when you log in, and other people will need to search using your new username when they want to look for your profile. All your projects will still be published under your account with your new username.
Note: if you are using a Guest account, you’ll need to sign up before you can change your username:
- Press the gear icon in the top right corner.
- Choose “Sign up.”
- Add an email that your parents allowed you to use.
- Now you can change your username!