Create an Addon domain – Client Area

You can log in to Your Client Area by going to this link.
Once you have logged into your Client Area click the Services green button.

In the My Products & Services table, find your hosting service and click the Manage button.

Scroll down the page until the Manage Account title, then choose the Addon Domains button.
You can also find the Addon Domains link in the right menu in alphabetical order.

Click the +Create Addon Domain button.

Domain Name
Type the new domain name. For example, example.com.
The interface automatically populates the remaining text boxes, and we recommend that you use these values.
However, you can enter different values in the Document Root (File System Location) and Subdomain text boxes if you desire.
Click the Create button.

If you get an error, the error occurs when the domain you are adding points to a remote host not associated with the server.
Update the domain registrar to point the domain to nameservers that are already pointed at the server.