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This section describes how to apply the following accessibility features:
Setting tab order
•
Adding bookmarks
•
•
Adding accessible links
Establishing a document language
•
Setting security settings so they don't interfere with screen readers
•
Adding a watermark to a PDF document
•
Setting the tab order
Having a preset tab order enables people with disabilities to use a keyboard to move among actionable items in an
Adobe PDF document in a logical order. Tab order applies to embedded links and URLs, form fields, and comments.
In accessible PDF documents, you should set the tab order to use the document's structure, which builds the tab
order from the tag tree and ensures a sequential path through a page. (If the PDF document has form fields, you
should have already done this step as part of the workflow, as described in "Section 8: Making Adobe PDF forms
accessible" on page 39.)
To set the tab order to the document's structure:
Open the Pages tab of the navigation pane.
1
Select all the pages by pressing Ctrl+A (Windows) or Command+A (Mac OS).
2
In the Pages tab, choose Options > Page Properties.
3
In the Page Properties dialog box, select the Tab Order tab, and then select Use Document Structure.
4
Adding bookmarks
Bookmarks enable people to navigate a document without paging through it. You often have the option to add
bookmarks to an Adobe PDF document during conversion to PDF from an authoring application. You can also add
bookmarks in Acrobat, either automatically from the structure of a tagged PDF document, or one at a time from
selected text.
To create bookmarks automatically from the structure, open the Bookmarks tab in the navigation pane, and then
choose Options > New Bookmarks From Structure.
To create bookmarks one at a time, use the Select tool to select the text on the page that you would like to use as the
bookmark, and then choose Options > New Bookmark from the Bookmark tab. You can also nest bookmarks in the
Bookmarks tab to reflect the hierarchy of information in the document.
Using a highly visible color and different type styles to denote top-level bookmarks further eases navigation for
visually impaired users. You can change the color and other properties of bookmarks by using the Bookmarks
Properties dialog box.
For instructions on using bookmarks, see "Adding navigability to Adobe PDF documents" in Acrobat 7.0 Help.
ADOBE ACROBAT 7.0
Section 12: Adding other accessibility features
86
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