Under the Domain Names section, select Manage Domains. The Domain Control Center opens.
In your list of domain names, click on the domain name that you want to view. The Details for the selected domain display.
Under the Total DNS Control section, click Manage Subdomains or Total DNS Control and MX Records.
Under Manage Subdomains, you can create and manage subdomain that are forwareded to another URL in your account. Under Total DNS Control and MX Records, you can modify the zone file (A records and MX records) for your domain.
For more in-depth information on managing your domain name click here
NOTE: You can only use Total DNS Control if you are using our nameservers for your domain