How to allow P4310 Purchase Order Inquiry Screen allow to copy by line instead of entire PO?

Hi Friends,

Any sharing from questions below?

How to allow P4310 Purchase Order Inquiry Screen allow to copy by line instead of entire PO?

1. Grid Record is fetch during CO_Copy Mode is not able to detect Line no or original PO number? When suppress grid, now able to place the valid condition to suppress unwanted lines.
2. If use Grid record is fetch, now it able to detect the GC value original PO line, but now the suppress grid row functions in not workable in this event rules.

Test Data Scenario:

Original PO with 5 lines. Need to to copy this PO line 1 and 3 to new PO. (Assume there is table to store line 1/3)