Make sure automated machinery is programmed and running properly.
Examines proof sheets to detect errors in position and alignment of type, page elements, margins, trim, and fold areas: Positions proof sheet on glass top of lighted, line-up table. Moves geared straightedges into position over proof copy to verify alignment of printed material, page, position, and folio continuity. Compares colors on proof sheet with standard color key to verify specified color register. Records degree and direction plates or type must be shifted to correct alignment, or marks corrective information on proof sheet. Draws trim, stitch, and fold lines for bindery processes and plate trim lines for stereotype and electrotype plate fabrication, using straightedge and printer’s line gauge.