From the dashboard, click “Domains”. Choose a domain name and click “Manage”, then scroll down and click “DNS Records”. Click the “Add DNS Records” button in the top right. If you are updating your name servers, you will need to delete the record you are replacing, and add the updated version. If you’re using Slamdot’s name servers, they should be:

ns1.slamdot.com
ns2.slamdot.com

It takes about 12-48 hours for the change to take effect.