Some hosting accounts allow to host more that one domain ( "domain" here means a website with it's own domain ) while others just allow to host a single domain.
We call these domain "Hosted Domains", while domains that simply point or redirect to a existing website are called "Parked Domains". "Hosted Domains" are full featured, while "Parked domains" are not. You can have a website and email accounts using a "Hosted domain", but you can only have email accounts on a "Parked Domains".
If yours allows hosting more than a single hosted domain, follow these instructions to add additional domains:
1 - Access your Hosting Panel
Just follow instruccions of How to access your Hosting Panel.
2 - Click on Hosted Domains
Look for and click on Hosted Domains icon.
3 - Add the domain
Simply type you new domain name in the form and click on the large Send button.
4 - Check it
The new domain will appear on that same section under Hosted Domains:
5 - Point the domain to guebs
In order to function you must point the domain to guebs. If the domain is registered with us it will usually point to guebs, so you won't have to do anything.