If you do not have a web host with us and want to enter other pointers for your domain, you must create a DNS zone in the customer zone. DNS zone is included free of charge in the domain service.

You do this by pressing manage for the domain you want to create the DNS zone for

There you go under DNS/Name servers

Here you see your nameservers that the domain has, and a little further down you have "Create DNS zone"

Here you write in an IP address (this can be any as it is only for creating the zone, you then remove the pointers that you are not going to use)

Then the DNS zone will be created. You can now remove the pointers you don`t want to use, as well as add the desired pointers.