Adobe READER 8 User Manual page 111

Override The Reading Order In Tagged Documents
instead of that specified by the tag structure of the document. Use this preference only when you encounter problems
in poorly tagged PDFs. This preference corresponds to the Override The Reading Order In Tagged Documents
option in the Accessibility Setup Assistant.
This preference determines how much of a document is delivered to a screen reader at a time. If
Page Vs Document
a PDF isn't tagged, Reader may analyze the document and attempt to infer its structure and reading order, which can
take a long time for a long document. You may want to set Reader to deliver only the currently visible page so that it
analyzes only a small piece of the document at a time. This consideration will vary depending on the size and
complexity of the document and on the features of the screen reader. When Reader delivers information to a screen
reader, screen magnifier, or other assistive software, it loads information into a memory buffer that is directly
available to the assistive software. The amount of information that is delivered to the memory buffer can affect how
long Reader takes to perform tasks, such as opening the document, advancing to the next page, changing views, and
carrying out commands.
•
Only Read The Currently Visible Pages
performance by eliminating the need for the software to process parts of the document that aren't visible. When
Reader sends only the currently visible pages of a PDF to the memory buffer, the assistive technology has access to
those pages only. It cannot go to another page until the next page is visible and Reader has sent the page information
to the memory buffer. Therefore, if this option is selected, you must use the navigation features of Reader, not those
of the assistive technology, to navigate from page to page in the document. You should also set the Default Page
Layout option in preferences to Single Page if you choose to have Reader send only the currently visible pages to the
assistive technology. Because Reader sends page information about all visible pages, the assistive technology receives
information about pages that may be only partially visible (such as the bottom of one page or the top of the next), as
well as those pages that are completely visible. If you use a page display setting other than Single Page, such as
Continuous, and then you display the next page, the technology may not correctly track which portion of a previous
page it has already read aloud. For instructions on setting the default page layout to Single Page, see "Preferences for
viewing PDFs" on page 24.
This option corresponds to the Only Read The Currently Visible Pages option in the Accessibility Setup Assistant.
•
Read The Entire Document
search tools and that is more familiar to you than the tools in Reader. This option corresponds to the Read The Entire
Document At Once option in the Accessibility Setup Assistant.
•
For Large Documents, Only Read The Currently Visible Pages
if you use a screen reader with long or complex PDFs. It allows Reader to deliver an entire small document but revert
to page-by-page delivery for large documents. This preference corresponds to the For Large Documents, Only Read
The Currently Visible Pages option in the Accessibility Setup Assistant.
Confirm Before Tagging Documents
prepares an untagged document for reading. Tagging can be a time-consuming procedure, especially for larger
documents. This preference corresponds to the Confirm Before Tagging Documents option in the Accessibility
Setup Assistant.
Set preferences in this section to control volume, speed, and pitch of the voice used for Read
Read Out Loud Options
Out Loud. You can choose to use the default voice or any of the voices provided by your operating system. Select
Read Form Fields to have Read Out Loud read the contents of form fields. These preferences don't correspond to
options in the Accessibility Setup Assistant.
Uses the reading order specified in the Reading preferences
This option is usually best when you use a screen magnifier. It improves
This option can be best if you use a screen reader that has its own navigation and
When selected, lets the user confirm the options that will be used before Reader
This option is selected by default and is usually best
ADOBE READER 8
107
User Guide