When Print Checks page is used, what determines the layout and content of the PDF that is generated?

AI generated answer (using internal Slack threads):

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ****** The layout and content of the PDF that is generated when using the Print Checks page in NetSuite is determined by the form that is selected at the time of printing. You have the option to choose between standard PDF and advanced PDF. The advanced PDF gives you the ability to add business logic within the print template. For transactions like Bill Payment, Check, and Cash Refund, the PDF template on the transaction form is used. For transactions like Customer Refund that do not have the PDF template field in the transaction form, you can specify a related form in the "Linked forms" tab on the original form (like Sales Order, Vendor Bill, etc.). That linked form can have a custom PDF assigned to it. Please note that there are additional layers if you're dealing with a OneWorld account. However, there is no option to assign a different format by Role.

That's not what comes out when I use the Print Checks feature. It is what comes out when I click the Print action on the Bill Payment record, but that's not what I was asking about.