The steps of desktop publishing are now done by printing offset machines. This is because such printers can print quickly and accurately using different colors and reprint from used plates. The preceding steps of pasting for making plates for printing on offset machines can be done very precisely using microcomputers , accessories, other equipment such as scanners , laser printers and software used on the desktop. In desktop publishing, only one skilled operator can do these tasks effortlessly, where multiple professionals skilled in different tasks would be required to complete the various steps prior to the final printing. Plates can be made with laser printer prints on tracing paper , without filming with a camera . For color printing, for a long time, four positives were made for the original four colors by manually color separation. But with the help of a scanner in desktop publishing, the necessary software scans the image on the computer ; For example, using Photoshop , Corel-Draw , Quark Express , Illustrator, etc., the final output can be extracted in a very short time with the help of pure image setter. In desktop publishing, although almost all the work can be done in one place, but it also has to go through many steps.