This illustrated manual explains how to use Photoshop for preparation and visualisation of artwork for screen prints as well as risographs. It especially focuses on converting halftones for black and white positives. It briefly explains how to work in layers. For using channels I would recommend the Multichannel manual. All chapters are illustrated with abstract compositions showing various types of halftones. Twenty years ago Otto began creating and publishing screen printed books. His first participation at an artists’ book fair was at the Barbican in 1996 where he showed his conceptual visual narrative ‘Helping you back to work’. Since then he has been presenting books at major artists’ book fairs around the world and has now published in excess of 80 titles.