1.Login to your cPanel manager
2.Go to your List Accounts, in the Find option, type list and select List Accounts
3.From the middle pane, click on the cPanel logo next to the domain you wish to manage.
4.Under the Domains option, select Subdomains option.
5.Type in your subdomain and choose your site from the drop down list
6.Choose your Document Root
7.Click Create to confirm your new subdomain