Hi Rodrigo
Unfortunately, you can't show additional custom fields on the EA40 screen "Display Printdocument" unless you modify the SAP standard code (I've checked IS-U 605).
Neither the main screen SAPLE22A 0500 allows for an additional tab nor does the sub-screen(s), mainly SAPLE22A 0501, have any custom-controls.
Yep
Jürgen