CROP, CROP MARKS
Crop To cut out or trim unneeded portions of an image or a page.
Crop Marks Crossed lines placed at the corners of an image or a page to indicate where to trim it. Also called corner marks. Center marks indicate the center of a 2-page spread.
The illustration above shows a typical two page spread with crop marks that indicate where the paper is to be trimmed. The inset shows the same spread trimmed (but not yet cut or folded down the center).
Layout Printing crop marks on camera ready print-outs is an option in some page layout programs. Crop marks may not print if the page size and paper size are the same or if the crop marks fall outside the print zone of your desktop printer.