acceptance at origin checkbox in PO

Hi All

My point of concern is there comes a tab in PO at Item Detail level in Delivery tab "Acceptance at Origin"..

I want to make it compulsory but the point is i am not able to find it in spro.

The path i am refering is spro>>MM>>Purchasing>>purchase Order>>Define Screen Layout at document level>> GR/IR tab...

Pls suggest

Thanks in advance