You can import records from already existing domains. If you have several domains on the same server for example, you can create the first domain, fill in the records, then import the records from the first domain into all subsequent domains hosted on the same machine.
This also gives you the possibility of defining templates. For example, if you often add the Google Apps MX records to your domains, you can create a domain called “my-name-gapps-template”, add the records there, then import the records from this domain into all domains where you need to activate Google Apps.
If you deselect the “Replace domain name in imported records” checkbox, the records will be created without replacing the old domain name with the new one.