1) Login to your cPanel Account, follow this article on how to do that click here
2) Under the Domains section click on the 'Subdomains' button
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3) Fill in the Subdomain field with the name of the subdomain
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4) Select the Domain field with the domain you'd like to use as part of the sub domain
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5) Fill in the Document Root field with the folder you'd like the subdomain to point to without your hosting directory
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6) Click on the 'Create' button
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7) A message will appear, click on the 'Go Back' button
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8) That is it! Your subdomain should now be viewable in the list below
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