You can set a default value where a domain should forward to after registering/transfer.
Login to your personal customer area.
Click on the menu item Settings → Default settings
Choose the Tab Nameserver.
You can set a value for Web- and Mailserver. IP addresses for A records / MX records or already existing Internet addresses for an URL forwarding. The master IP address is only needed if you use us as Secondary-DNS.
Click on Save.
For future orders the default settings will be used until you change Nameserver settings in the shopping cart.