With the continuous increase of PDF replacing hard copies, and the ongoing adoption of the PDF as a valid form for official documents, SAP Business One extends its PDF support to additional documents:
In the Print Preferences window, you can define that when adding a deposit or payment document (incoming/outgoing) the added documents will automatically be exported as PDF. You can then use this PDF as needed – e.g. send by email, attach to the original document, etc.
Available in SAP Business One 10.0 FP 2011 and SAP Business One 10.0 FP 2011, version for SAP HANA.
Source: SAP community