Hello Support:
My client has 10 monthly batches with about 75 invoices each. They like to Preview each batch before printing.

If they choose "Use selected specification", Previewing works perfectly and they can see all 75 invoices in one preview.

But if they choose "Use current customer specification", they see 75 separate "previews" that load up one-at-a-time. I expect this is because of the possibility that each 75 Customers could have a distinct invoice spec file. Is this the way that it is or is there something we could do differently?

AdagioPDF creates 75 separate PDF files so that doesn't help, though I suspect a different PDF driver could create a single file.