VDO Panel lets you change your existing installed domain via the Main Domain field, in the Branding section. To change domain, you must have to point your domain or subdomain to the server's Main IP Address.
To point a domain or Subdomain to the server's main IP address, you can follow a Record Update Guide. You can manage Web hosting control panels like cPanel or Plesk as well as Domain Control Panel.
For this purpose, you can follow the following links for different providers: