1. Click on the Menu option at the bottom left of the screen → Settings → Account Settings
2. Click the pencil-shaped icon next to your nickname.
3. Enter the desired nickname and click 'Confirm'.

In addition, please check the nickname creation rules below:

1. Spaces and special characters cannot be used.
2. You can enter up to 12 Korean and English characters.
3. You cannot create identical nicknames.
4. Nicknames containing inappropriate words cannot be created.
※ Nicknames containing inappropriate words will be changed.

❗ Use of the accounts that have such nicknames may be restricted.
Thus, be careful while making a nickname.