The document discusses enhancing the Point of Delivery (PoD) screen in SAP with a customer subscreen to display the internal ID of the PoD. This is done using a SAP-provided customer subscreen and implementing the BADI ISU_EDM_POD_CUSTOMER. The implementation assigns the subscreen to the PoD screen and adds code to the PUT_DATA_TO_SCREEN method to export the internal ID to memory, where the subscreen can access it. Activating the BADI implementation and code displays the internal ID on the enhanced PoD screen as desired.