Operation Manual

416
USING PHOTOSHOP
Saving and exporting images
Last updated 12/5/2011
General options for Adobe PDF
You can set the following options in the General section of the Adobe PDF Options dialog box:
Description Displays the description from the selected preset, and provides a place for you to edit the description. You
can paste a description from the clipboard. If you edit the description of a preset, the word “(Modified)” is added at
the end of the preset name.
Preserve Photoshop Editing Capabilities Preserves Photoshop data in the PDF, such as layers, alpha channels, and
spot colors. Photoshop PDF documents with this option can be opened only in Photoshop CS2 and later.
Embed Page Thumbnails Creates a thumbnail image of artwork.
Optimize For Fast Web View Optimizes the PDF file for faster viewing in a web browser.
View PDF After Saving Opens the newly created PDF file in the default PDF viewing application.
Compression and downsampling options for Adobe PDF
When saving artwork in Adobe PDF, you can compress text and line art, and compress and downsample bitmap
images. Depending on the settings you choose, compression and downsampling can significantly reduce the size of a
PDF file with little or no loss of detail and precision.
The Compression area of the Adobe PDF Options dialog box is divided into three sections. Each section provides the
following options for compressing and resampling images in your artwork.
Downsampling If you plan to use the PDF file on the web, use downsampling to allow for higher compression. If you
plan to print the PDF file at high resolution, do not use downsampling. Select the Do Not Downsample option to
disable all downsampling options.
Downsampling refers to decreasing the number of pixels in an image. To downsample images, choose an interpolation
method—average downsampling, subsampling, or bicubic downsampling—and enter the desired resolution (in pixels
per inch). Then enter a resolution in the For Images Above box. All images with resolution above this threshold are
downsampled.
The interpolation method you choose determines how pixels are deleted:
• Average Downsampling To Averages the pixels in a sample area and replaces the entire area with the average pixel
color at the specified resolution. Average downsampling is the same as Bilinear resampling.
• Subsampling To Chooses a pixel in the center of the sample area and replaces the entire area with that pixel color.
Subsampling significantly reduces the conversion time compared with downsampling but results in images that are
less smooth and continuous. Subsampling is the same as Nearest Neighbor resampling.
DeviceN color space with 8
colorants is supported.
DeviceN color space with 8
colorants is supported.
DeviceN color space with up to 31
colorants is supported.
DeviceN color space with up to 31
colorants is supported.
Multibyte fonts can be
embedded. (Distiller converts the
fonts when embedding.)
Multibyte fonts can be
embedded.
Multibyte fonts can be
embedded.
Multibyte fonts can be
embedded.
40-bit RC4 security supported. 128-bit RC4 security supported. 128-bit RC4 security supported. 128-bit RC4 and 128-bit AES
(Advanced Encryption Standard)
security supported.
Acrobat 3.0 (PDF 1.3) Acrobat 5.0 (PDF 1.4) Acrobat 6.0 (PDF 1.5) Acrobat 7.0 (PDF 1.6) and
Acrobat X (PDF 1.7)