This book provides background information as well as step-by-step procedures on the key elements of reproducing and manipulating colour images using photostop, QuarkXPress and Cachet. Topics covered include printing, screens, resolution, colour theory, tonal range, scanning, file formats, proofs, calibration, tone correction, colour correction, colour separations, image manipulation, duotones, tonal value changes, image compression, trapping and output. The book discusses colour theory as an essential background to colour output. It reviews the basics of offset litho and shows how various screens, resolutions and scanning processes can dramatically affect final image. It also shows how to retouch or alter an image using various tools and filters.