This is done using your CPANEL (Control Panel)

First check by looking on the Right Hand Side of your CPANEL screen how many subdomains you have been allocated and how many you have got left to use.



(in the example above there are 25 subdomain available with three being used)

If you don't have enough then click here and order an additional subdomain

(Note:- cost is per subdomain  for 12 months)

Look for the subdomain section in your CPANEL

Click on 'Manage SubDomains'

Please Note if you have more than one domain parked/Addon select the domain you want to add the subdomain from the dropdown list.
DO NOT CREATE A SUBDOMAIN ON TOP OF AN EXISTING SUBDOMAIN
Example were there is more than one domain parked or addon domains

Add the New Subdomain Name and click the Add button

You will have be patient and wait while the domain is being created, as this may take a few minutes as the DNS is updated on all servers.
When you see this message the subdomain has been created and is ready to use.



That's it your subdomain is ready to use