DNS ns Gandi.net


I’ve got these question:

When i buy a domain in gandi.net with virtualmin domain registrar , for example awiyem.es
the record dns for ns it’s awiyem.es but when i buy another domain automatically it’s awiyem.es and not the domain that i buy it.How can i do? Change dns that is the same that i buy it?
Can i do with something like $Domain ? ( in name server )


Daniel Witoszek Arias