1. Log.. (eg: www.example.com:2443/siteworx/ )2. Under "SiteWorx .", click the "Hosting Features" . item if it is not already open.3. Click the "Domain" . item and then. "Subdomain" option.4. Under the "Add a Subdomain" tab, enter your subdomain name in the "Subdomain" field.5.. "Add" babies.