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Chapter 13. Printing > PostScript

PostScript

To put it simply, PostScript is what makes desktop publishing with QuarkXPress possible. PostScript is a page-description language—a collection of commands that PostScript laser printers understand. When you tell QuarkXPress to print a page, it writes a computer program in PostScript describing the page, and sends that program to the printer. The printer (or imagesetter), which has a PostScript interpreter inside it, interprets the PostScript describing the page, and puts marks on the paper (or film) according to that description.

For instance, the PostScript command lineto tells the printer to draw a line from one point to another; curveto draws curves, and setlinewidth changes the thickness of the line the printer is about to image. You don't really need to know much about PostScript in order to get your job done, but it's important to know that it's there, working behind the scenes.


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