From here you can add your new doamin name as pictured below.

You can now register domain names directly through your account at Thexyz.
Domain Name System (DNS) The Domain Name System (DNS) is a distributed database, arranged...
Thexyz offers registration of Domain Names under various New gTLD extensions. TLDs in General...
Professional Email Hosting With Your Own Domain How to set up a custom domain email address...
If you have a domain name registered then you will also need to supply accurate contact...
Thexyz sends an email to the Registrant of a domain name (under the extensions listed below) 6...