PostScript Quick 10 0 {abs exch abs sub abs 1 exch sub} setscreen /f 256 string def Tips: Converting 0 1 255 {f exch dup 0.96 mul cvi put} for PostScript to EPS 18 36 translate 576 360 scale 256 1 8 [256 0 0 -1 0 1] {f} image Copyright © 1995 Herb showpage Weiner. All rights reserved. Permission is hereby granted to select a single page from the to use these tips in the design If the resulting EPS file does document. In most cases, you not produce the same result and production of any can simply choose “Save As...” document. when printed as the original from the “File” menu, change PostScript file, you can replace Most desktop publishing the Format from PDF to EPS, the generated PostScript in the software can include EPS and choose the Preview and EPS file with the original (Encapsulated PostScript) Compatibility Mode. Choose PostScript. You must either images. Unfortunately, some a one bit Preview Mode for use an editor (such as Adobe’s PostScript graphics are not in Black and White files, or to LaserTalk) that can open EPS EPS format. For example, save space for Gray Scale or format files, or you must some books contain PostScript Color files. Choose eight bit change the file type from examples that are not in EPS Preview Mode for Gray Scale “EPSF” to “TEXT”, edit the format, and PostScript files or Color files if saving space is file, then change the file type received from other computer not an issue. back to “EPSF”. There are a platforms or from the Internet For most PostScript files, this number of utilities (such as may not be in EPS format. is all that’s necessary. Some Apple’s ResEdit) that allow This Quick Tip describes a PostScript files, however, may you to change the file type. method for converting a not be converted correctly: EPS files contain special PostScript page description to • The Distiller ignores PostScript comments at the EPS format. Note that some custom halftone screens beginning. Programs that PostScript files (such as fonts) and fill patterns. The import EPS files read these are not actually page resulting PDF files print comments. Two comments are descriptions, and can not be using the standard halftone mandatory for EPS files: the converted to EPS format. screen. The PostScript “%!PS-Adobe-3.0 EPSF-3.0” In order to perform this code in Figure 1 comment on the first line of conversion, you will need demonstrates this problem. the file, and the Adobe Illustrator version 5.5, It prints a gradient using a “%%BoundingBox” which includes Adobe Acrobat coarse crosshatched screen, comment. (The BoundingBox Distiller version 1.0. Note that much like a window comment includes four Distiller version 2.0 is not screen. When Distilled to a numbers, which will vary from compatible with Illustrator PDF file, however, it file to file.) When you edit the version 5.5. (Illustrator 5.5 can displays as a gray scale and EPS file, leave these two not open PDF files created by prints using the standard comments, and remove the Distiller 2.0.) halftone screen. remainder of the file. (If you Begin by Distilling the • Some files which Distill wish, you may also retain the PostScript file, to convert it to successfully can not be %%Creator, %%For, PDF format. If the file correctly imported into %%Title, %%CreationDate, contains photographs or paint Illustrator 5.5. Type 3 and %%DocumentFonts style graphics, be sure to turn fonts and fonts using non- comments.) Then, place the off Downsampling and standard encodings are not original PostScript after these Compression for Images using always imported correctly. comments, and save the file. the Distiller Job Options For example, the The resulting EPS file will dialog box before Distilling the PostScript program on include the screen preview file, to avoid image quality Pages 282-283 of the generated by Illustrator, but degradation. PostScript Language when printed, will produce Reference Manual, Second results identical to the original Next, open the PDF file in PostScript. Illustrator 5.5. If the original Edition, is correctly PostScript file contained processed by Distiller, but multiple pages, Illustrator will produces a blank page present a dialog allowing you when imported into Illustrator 5.5.