The "P.O. Settings" section is where you can choose what the first PO number will be. You can choose how many digits you would like your POs to be and whether you would like a prefix before your PO number such as SD.
You can also lock PO settings, such as Lock Purchase Orders after final approval or Lock Account Code after final approval (no amendments will be possible).
You can also create a Special Flag in this section with a unique name. If you turn this feature on, you will be able to flag PO’s as special.