Adobe 22001438 - Acrobat - PC Using Manual page 63

Adobe Acrobat Help
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Remove Transfer Functions removes any applied transfer functions. Applied transfer
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functions should be removed unless the PDF file is to be output to the same device that
the source PostScript file was created for.
Preserve Halftone Information retains any halftone information in files. Halftone infor-
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mation consists of dots that control how much ink is deposited by halftone devices at a
specific location on the paper. Varying the dot size and density creates the illusion of
variations of gray or continuous color. For a CMYK image, four halftone screens are
used: one for each ink used in the printing process.
In traditional print production, a halftone is produced by placing a halftone screen
between a piece of film and the image and then exposing the film. Electronic equivalents,
such as in Adobe Photoshop, let users specify the halftone screen attributes before
producing the film or paper output.
As with transfer functions, halftone information is intended for use with a particular
output device.
9 To apply the changes to the current job options, click OK.You cannot overwrite the
predefined sets of options.To save the changes as a different job options file and make
that the new job options file, click Save As.Then enter a name and location for the new set,
and click Save in the Save Job Options As dialog box. By default, these files are saved in the
Distillr/Settings folder (Windows) or Distiller/Settings folder (Mac OS) in the Acrobat
folder.
Setting the Distiller Advanced job options
The Advanced job options specify Docment Structuring Conventions (DSC) comments to
keep in an Adobe PDF file and set other options that affect the conversion from PostScript.
In a PostScript file, DSC comments contain information about the file (such as the origi-
nating application, the creation date, and the page orientation) and provide structure for
page descriptions in the file (such as beginning and ending statements for a prologue
section). DSC comments can be useful when your document is going to print or press.
When working with the Advanced job options, it is helpful to have an understanding of
the PostScript language and how it is translated to PDF. See the PostScript Language
Reference, Third Edition (Addison-Wesley), the Portable Document Format Reference Manual,
and Updates to the Portable Document Format Reference Manual. (The latter two
documents are available on the Adobe Web site at www.adobe.com.)
To change the Advanced job options:
1 Select an existing set of job options from the Job Options menu to use as a starting
point.
2 Choose Settings > Job Options, and click the Advanced tab.
3 Select the file conversion options you want:
Use Prologue.ps and Epilogue.ps to send a prologue and epilogue file with each job.
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These files have many purposes. For example, prologue files can be edited to specify
cover pages; epilogue files can be edited to resolve a series of procedures in a
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Acrobat Distiller Options
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