Use Case: We have a list of custom records A showing on a custom record B. Transactions have a single select of type B on them. I want to show a text summary of the As on my transaction in Advanced PDF/HTML template. I know I won’t be able to directly access the sublist via Advanced PDF/HTML template, so to achieve this, I created a custom field on B of type Long Text that updates itself whenever something on the sublist changes. Then, I display this field on my transaction template.