Methods and apparatus are provided for receiving a print file having an actual page size, and a nominal imposition template specifying a nominal page size, and generating an imposition flat for printing. If the actual page size matches the nominal page size, the nominal imposition template is applied to the print file without change. If, however, the actual page size differs from the nominal page size, the nominal imposition template is automatically modified based on the actual page size, and then the modified imposition template is applied to the print file to create the imposition flat.