This link will take you to the DNS Configuration page:
On this page you can see several blocks of DNS records. Some are built-in and non-removable; others are user-defined and can be deleted. Built-in MX records require special consideration: they can be removed by disabling mailservices for this domain., but all e-mail resources, including mailboxes, forwarders, and autoresponders will also be deleted. The removal of email services was made possible to enable the use of e-mail services provided by other mail servers.
You can add any type of DNS records by clicking an appropriate link. You will be asked to enter corresponding DNS data.