Find "Advanced Zone Editor" under "Domains" Category in cPanel. 

 

 

 

1.    Select a domain from the drop-down menu.

 

2. Kindly refer below image/example to add new CNAME record.

Name: Fill in your domain, subdomain or URL
TTL: Default is set to "14400"
Type: Select 'CNAME'
CNAME: Domain name or URL

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