Hi Konar,
Goto SPRO->Extended warehouse management > Cross-process settings > Shipping and Receiving > Message Processing > Define action conditions for Transport units.
double click on Transport unit, if you find your form name in the right hand side select your form and go to the processing details tab strip which is there in lower left hand side, go to printer tab strip lower right hand side there you can find no of copies option.
Regards,
Murali Dasari....
