Adobe InDesign CS3 - Manual (Page 491)

INDESIGN CS3
User Guide
484
file would fail compliance when inspected by the Preflight feature in Acrobat 7.0 Professional and later, or the
Enfocus PitStop application (which is a plug-in for Acrobat 6.0).
Font, OPI, and flattening options for PDFs
You can set the following options in the Advanced area of the Export Adobe PDF dialog box.
Subset Fonts When Percent Of Characters Used Is Less Than Sets the threshold for embedding complete fonts based
on how many of the font’s characters are used in the document. If the percentage of characters used in the document
for any given font is exceeded, then that specific font is completely embedded. Otherwise, the font is subsetted.
Embedding complete fonts increases file size, but if you want to make sure you completely embed all fonts, enter 0
(zero). You can also set a threshold in the General Preferences dialog box to trigger font subsetting based on the
number of glyphs a font contains.
OPI Lets you selectively omit different imported graphics types when sending image data to a printer or file, leaving
only the OPI links (comments) for later handling by an OPI server.
Preset If Compatibility (in the General area of the dialog box) is set to Acrobat 4 (PDF 1.3), you can specify a preset
(or set of options) for flattening transparency. These options are only used when exporting spreads with trans-
parency in artwork.
Note: Acrobat 5 (PDF 1.4) and later automatically preserve transparency in artwork. As a result, the Preset and Custom
options are not available for these levels of compatibility.
Ignore Spread Overrides Applies the flattener settings to all spreads in a document or book, overriding the flattener
preset on an individual spread.
Create JDF File Using Acrobat Creates a Job Definition Format (JDF) file and starts Acrobat Professional for
processing the JDF file. A job definition in Acrobat contains references to the files to be printed as well as instructions
and information for prepress service providers at the production site. This option is only available if Acrobat 7.0
Professional or later is installed on your machine. For more information, see Acrobat Help.
See also
“Options for omitting graphics” on page 557
Adding security to PDF files
When saving as PDF, you can add password protection and security restrictions, limiting not only who can open the
file, but also who can copy or extract contents, print the document, and more.
A PDF file can require passwords to open a document (document open password) and to change security settings
(permissions password). If you set any security restrictions in your file, you should set both passwords; otherwise,
anyone who opens the file could remove the restrictions. If a file is opened with a permissions password, the security
restrictions are temporarily disabled.
The RC4 method of security from RSA Corporation is used to password-protect PDF files. Depending on the
Compatibility setting (in the General category), the encryption level will be high or low.
Note: Adobe PDF presets don’t support passwords and security settings. If you select passwords and security settings in
the Export Adobe PDF dialog box, and then click Save Preset, the passwords and security settings won’t be preserved.