I am meeting a issue of the layout of the released PO enhancement.
The released PO have two ways for opening in change mode:
1. Almost fields can be change after the PO approing
2. none of a field can be change after the PO approving.
But I want control some field, such as price, payment terms and currency etc to only display by open in change mode.
Can I use this BADI ME_PROCESS_PO_CUST to satisfy this requirement? Or you have some good suggestion for it?