Adobe PHOTOSHOP 6.0 Manual page 370

CHAPTER 13
360
Saving and Exporting Images
• DCS 2.0 format retains spot channels in the
image. You can choose between saving color
channel information as multiple files (as for DCS
1.0) or as a single file. The single-file option saves
disk space. You can also include a 72-ppi grayscale
or color composite with the image.
Specify an encoding method when printing to a
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PostScript output device:
ASCII to use the most generic encoding method.
•
Use ASCII encoding if you're printing from a
Windows system, or if you experience printing
errors or other difficulties.
Binary to use a faster encoding method that
•
produces a smaller output file and leaves the
original data intact. Use Binary encoding if you're
printing from a Mac OS system. However, some
page-layout applications and some commercial
print spooling and network printing software may
not support binary Photoshop EPS files.
JPEG to use the fastest encoding method. JPEG
•
encoding compresses the file by discarding some
image data, thus reducing the quality of your
printed output; for the best printed results, choose
maximum quality compression. Files with JPEG
encoding can be printed only on Level 2 (or later)
PostScript printers and may not separate into
individual plates.
Select Include Halftone Screen and Include
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Transfer Function to save the image's halftone
information (including the frequencies and angles
of the screens) and transfer function information.
The PostScript language interpreter in some appli-
cations can use these screen settings when color
separations are generated. You can also choose the
Override Printer's Default Functions option in the
Transfer Functions dialog box.
For more information, see "Compensating
for dot gain in film using transfer functions"
in online Help.
To display white areas in the image as trans-
7
parent, select Transparent Whites. This option is
available only for images in Bitmap mode.
If you are saving to EPS format, select
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PostScript Color Management to instruct the
printer to convert the file data to the printer's color
space. Select this option only if you have not
already converted the file to the printer's color
space. However, do not select PostScript Color
Management if you're planning to place the image
into another color-managed document. Doing so
may disrupt color management in your page
layout application.
Note: Only PostScript Level 3 printers support
PostScript Color Management for CMYK images.
To print a CMYK image using PostScript Color
Management on a Level 2 printer, convert the image
to Lab mode before saving in EPS format.
9 If the image contains vector graphics (such as
shapes and type), select Include Vector Data to
preserve vector data in the file. However, saved
vector data in EPS and DCS files is only available
to other applications; when you reopen the file in
Photoshop, the vector data will be rasterized.