Pdf Hacks

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Hack 38 Acrobat Distiller and Its Profiles

Select the best Distiller profile for your purpose.

When you use Acrobat's "Print to PDF" or use the PDFMaker macro for Word, Adobe's Distiller is the engine that creates your PDF. What kind of PDF do you need? You can configure Distiller to create the best PDF for your purpose. The choice is usually between document fidelity and file size. File size becomes an issue only when distributing a PDF electronically. When in doubt, choose fidelity.

4.8.1 Changing the Distiller Profile

Acrobat Distiller comes with a few preconfigured profiles. They are also called Settings or joboptions files. When printing to PDF, change the profile by clicking the Print dialog's Properties button (Windows), or by selecting PDF Options from the drop-down box that starts out saying Copies & Pages (Mac). Select the Adobe PDF Settings tab and select a Distiller profile from the Default Settings: (Acrobat 6) or Conversion Settings: (Acrobat 5) drop-down box. This choice is not permanent. To change the default profile, consult the Adobe PDF (Acrobat 6) or Acrobat Distiller (Acrobat 5) printer properties.

When using PDFMaker on Windows, change its profile inside Word by selecting Adobe PDF Change Conversion Settings . . . (Acrobat 6) or Acrobat Change Conversion Settings . . . (Acrobat 5). This choice, shown in Figure 4-6, becomes the default.

Figure 4-6. Distiller settings, which you use whenever you create PDFs using Acrobat

When creating a PDF for a print shop or service bureau, ask them for a joboptions file to use. On Windows, move it to Distiller's Settings folder, which is located somewhere such as C:\Program Files\Adobe\Acrobat 5.0\Distillr\Settings\. On the Macintosh, open Distiller and use the Settings Add Adobe PDF Settings . . . menu option to add it to the list. Then, select the print shop or service bureau's profile when creating your PDF, as described earlier.

4.8.2 Stock Distiller Profiles, Side by Side

Each profile that comes with Acrobat has subtle differences. We highlight only the big differences in Tables Table 4-1 and Table 4-2 because they have the greatest effect on your PDF.

Table 4-1. Acrobat 6 Distiller profiles

	Smallest File Size	Standard	High Quality and Press Quality
Color Image Resolution (dpi)	100	150	300
Gray Image Resolution (dpi)	150	150	300
Mono Image Resolution (dpi)	300	300	1200
Compressed Image Fidelity	Low	Medium	Maximum
Embedded Fonts	None	[1]	All

^[1] All fonts are embedded except Base 14 fonts and these Windows system fonts: Century Gothic, Georgia, Impact, Lucida Console, Tahoma, Trebuchet, and Verdana.

Table 4-2. Acrobat 5 Distiller profiles

	Screen	eBook	Print	Press
Color Image Resolution (dpi)	72	150	300	300
Gray Image Resolution (dpi)	72	150	300	300
Mono Image Resolution (dpi)	300	300	1200	1200
Compressed Image Fidelity	Medium	Medium	High	Maximum
Embedded Fonts	None	All Except Base 14	All	All

A 150 dpi image is usually appropriate for printing on a 600 dpi black-and-white laser or inkjet printer. So, the Standard profile (Acrobat 6) seems to suit most purposes. Color printers can take advantage of higher image resolutions. Visit http://www.scantips.com/basics03.html to discover the principles of printer arithmetic.

In Acrobat 5, the eBook profile serves most purposes; it resembles the Standard profile very closely. Who would have guessed that?

When distilling a document containing mostly screenshot images, try using the ZIP image compression filter instead of JPEG. In Distiller 5, you can also try the 4-bit and 8-bit quality settings. Not only does this yield superior screenshot compression, but you also get superior images. See [Hack #42] to learn how to alter Distiller profiles. These compression settings are under the profile's Images tab (Acrobat 6) or Compression tab (Acrobat 5)

If your readers will be downloading files from the Web or receiving them through email, using the Smallest File Size (Acrobat 6) or Screen (Acrobat 5) profile will ensure that low-bandwidth users aren't clobbered with long PDF downloads. On the other hand, if you're sending files to a printer and want the best results possible, you'll want to use the Press Quality profile, which yields the highest-fidelity PDF.

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