Ho w to create a voucher from an SD/OD order dropship

Ho w to create a voucher from an SD/OD order dropship. I have created an SD/OD order, received PO, generated an invoice for the customer, now how do I generate a voucher for the vendor. in oracle document its referring to P4314 progress payment processing needs to be turned on in processing option. For most vouchers we are using standard voucher program. Can progress payment be turned on in conjunction with standard voucher processing, and how does it work. please provide your feedback.

Thanks