simply append to /etc/named.conf file

zone "zonename.com" IN {
type slave;
masters {x.x.x.x};
file "zonename.com";
allow-update { none; };
};
* where zonename.com is your zone's name
* where x.x.x.x is the IP address of master dns server
* in "file" line choose the filename that you wish.It will be created under /var/named directory.
save the /etc/named.conf file and then restart the named service.If everything is set correctly on Master dns server - after restart the file will be created automatically for your zone under /var/named