We have a scenario where in users are sending the PO details to vendors even before the po is released which is a big problem. IF we go to ME9F & give the PO number which is not released completely, then NO suitable PO documents found like that we get message & hence there is no problem from ME9F. But users are going to ME23N & click on print preview tab, from there taking screen shots & sending to vendor. To avoid this can we grey out print preview tab in Purchase order. Please suggest.