On Hand Quantity of Item In purchase order and Purchase Requisition

Summary:

Hello,

We have a requirement where the client wants to see the on-hand quantity of the item in the purchase order and purchase requisition line for any items ordered like we are able to see the on han dwhen we perfom misc transaction or subinventory transfer likewise we need for PR and PO.

they want to have to have a clear visibility of the items they are ordering so that they dont overstock the goods or inventory.

If I open the DFF, then How can I fetch the on hand quantity in the PO and PO line that is the main concern.