Abstract: A system for optically scanning copy and engraving a printing plate, having a carrier for a plurality of sets of copy and a plurality of optical scanners, one for each set of copy, a scanner having an electrical signal output representing the scanned copy, a plurality of engravers one for each of said scanners, responsive to an input signal to engrave the printing plate to produce copy, an improvement wherein a circuit interconnects the output of each scanner with the input of the associated engraver, a circuit having a plurality of transfer functions, each transfer function matching a characteristic of the set of copy scanned by said scanner, and means are included for selecting for each scanner and associated engraver one of the plurality of transfer functions for said circuit.