Delegating a domain name in ispmanager 6
To delegate domain name management to your ispmanager 6 control panel, first set up your own nameservers according to the official instruction.
Once your own nameservers are configured and accessible externally, in your domain name registrar's account, go to the Domains section (the name may vary), find the section for managing DNS records (or resource records) for the desired domain, and change the NS record values to reflect the names of your nameservers, for example, ns1.myns.com and ns2.myns.com.
Changing the values of any DNS records can take up to 72 hours, but typically it happens within an hour.
After successful delegation, you will be able to manage all the DNS records for the domain directly in your ispmanager 6 control panel.