Also, I'm not sure I understand what you're asking, but from the service manual, I see these following modes :
08-604 ( APS Priority Selection: 0= APS, 1= AMS, 2= None ),
08-618 ( Original Size Priority: 0= Same size originals, 1= Mixed size originals ).
08-481 ( Auto Change of Paper Source: 0= OFF, 1= ON for paper with same size & direction, 2= ON for paper with same size )
Maybe one of these is what you're looking for.
Claudio
