PostScript 2 and 3 are more advanced PostScript languages than PostScript 1. Using a PostScript 2 or 3 printing device can reduce printing errors and let you use features that are unavailable when you use a PostScript 1 printing device. If you try to use PostScript 2 or 3 options and are not using a PostScript 2 or 3 device, the print job does not print properly. If you are not certain whether you are printing on a PostScript 2 or 3 device, do not enable these options.
PostScript 2 and 3 let you use JPEG compression to compress the bitmaps in a print job and make the file smaller. Also, PostScript 2 and 3 use a faster method to render vector graphics.
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