Step::2 Click on My Domains option under Domains tab
Step::3 In “My Domains” page click on the drop-down icon and choose Manage Domain
Step::4 Now click on Private Nameservers in the sidebar.
Here you can modify the nameservers in “Modify a Nameserver IP section”
Step::5 You can also Delete the existing nameservers. Click on Save Changes when done.
Visit our Blog for more details. You can also watch the video here.