How to distribute entire workbook as a SINGLE PDF document in RDA Distribution?

With Sage Intelligence Report Designer Add-in (v1.0.0.16) for Sage 500, when a report is distributed as a PDF file, each sheet/tab is sent as a separate file.     Is there a way to get them to send as a single PDF file?

This looks to be by design, as the "Distribute each worksheet as separate documents" option is checked and grayed out when PDF format is selected.   With other formats, it's selectable.

Thanks in advance