Step 1

Login to our domain management control panel
Here: https://www.namesarecheap.com/managenames.shtml

Step 2

NOTE: ('Domain Locking' feature must be disabled - click on 'Domain Locking' to disable)
Click NameServers

Step 3

Type Primary DNS (e.g. ns1.yourhost.com) and Secondary DNS (e.g. ns2.yourhost.com)

Click 'Save Configuration'

If you wish to create your own nameservers, such as ns1.yourdomain.com, follow snapshot below
 (IP from your ISP/Host is required).

Snapshot