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ADOBE ACROBAT 7.0
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Section 13: Fixing advanced accessibility problems
Adding alternate text to a link by using the TouchUp Properties dialog box
Rearranging tags
When you insert or replace pages in a tagged Adobe PDF document, Acrobat adds the tags (if any) for the new pages
at the end of the tag tree. For optimal accessibility, you should move the entire collection of tags for each new page
in the tag tree to match the proper reading order in the document. This enables screen readers, the Read Out Loud
tool, and the Save As Accessible Text feature to present the document in the right order. Doing this task is particularly
important if you expect users to save the PDF content as accessible text for use with other systems, such as Braille
translators.
Rearranging tags in the tag tree is also a useful way to deal with PDF documents that contain articles that jump to
later pages in the document—for instance, from page 3 to page 7 to finish a story. Articles that jump to later pages
present an accessibility problem, because assistive technology generally reads a document page by page. By gathering
all the tags that relate to a story in the same area of the tag tree, you enable assistive technology to present all the story
text at once, in order, to the user.
To simplify the task of rearranging tags for an entire page in the tag tree, collapse the tags to the page level and select
the parent tag for the page. Drag or, if the tree is very long, cut and paste the parent tag to its new location. Be careful
where you drop the tag; you may need to drag the tag left or right to keep it from being a child to the wrong tag. All
child tags move with their parent tag.
For additional instructions on rearranging tags in the tag tree, see "Advanced tools for correcting tagging errors" in
Acrobat 7.0 Help.
Deleting tags
When you replace or delete pages in a tagged Adobe PDF document, Acrobat retains all the tags that belonged to the
pages that you removed. You should delete these obsolete tags so that assistive technology does not attempt to process
them. Deleting extraneous tags reduces the document's file size and improves Acrobat performance.
Deleting tags is also useful when you need to clean up a portion of the tag tree before you create a new structure from
scratch—for instance, if you want to tag a complex table by starting over.
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