Operation Manual

258
USING ACROBAT X STANDARD
Accessibility, tags, and reflow
Last updated 10/11/2011
Set the document language
Setting the document language in a PDF enables some screen readers to switch to the appropriate language. You can
set the document language for an entire document with Acrobat Pro or Acrobat Standard. You can set the document
language for specific portions of a multi language document with Acrobat Pro.
• To set the language for an entire document, choose File > Properties. Then select a language from the Language
menu in the Reading Options area of the Advanced tab.
• To set the language for an entire document to a language not in the Language menu, choose File > Properties. Then
enter the ISO 639 code for the language in the Language field in the Reading Options area of the Advanced tab. For
more information about ISO 639, see
www.loc.gov/standards.
Prevent security settings from interfering with screen readers
A document author can specify that no part of an accessible PDF is to be copied, printed, extracted, commented on,
or edited. This setting could interfere with a screen reader’s ability to read the document, because screen readers must
be able to copy or extract the document’s text in order to convert it to speech.
To maintain document security while allowing screen readers access to text, use one of the following settings:
• For low-encryption-level security, select Enable Copying Of Text, Images, And Other Content in the Password
Security - Settings dialog box.
• For high-encryption-level security, select Enable Text Access For Screen Reader Devices For The Visually Impaired
in the Password Security - Settings dialog box. This option overrides the document’s security settings only for the
purpose of giving assistive software, such as screen readers, access to the content.
If your assistive technology product is registered with Adobe as a Trusted Agent, you can read PDFs that might be
inaccessible to another assistive technology product. Acrobat recognizes when a screen reader or other product is a
Trusted Agent and overrides security settings that would typically limit access to the content for accessibility purposes.
However, the security settings remain in effect for all other purposes, such as to prevent printing, copying, extracting,
commenting, or editing text.
More Help topics
“Securing documents with passwords” on page 200
About watermarks and screen readers
You can add a watermark to a tagged PDF without adding it to the tag tree. Not having the watermark appear in the
tag tree is helpful for people who are using screen readers, because they won’t hear the watermark read as document
content.
The best way to add a watermark that doesn’t interfere with screen readers is to insert an untagged PDF of the
watermark into a tagged PDF.
More Help topics
“Add and edit watermarks” on page 94