Ver 2009.1 -- Forms

I'm very confused by the following:

System Preference Form Printing Option

Now, when you are printing forms, in the Form field you can select System Preference to use the default form you have previously set up. Also, you can still select a standard or custom form.

When you select a form, NetSuite remembers your selection and uses it each time, until you make another selection in the Form field. This capability can be helpful if you use different defaults for printing in various roles or subsidiaries in your NetSuite account.

Note: You can set default forms by checking the Form is Preferred box on the custom form record or by checking the box in the Preferred column next to the form on the Custom Transaction Form page at Setup > Customization > Forms > Transactions Forms