Adobe 22001438 - Acrobat - PC Using Manual page 87

Adobe Acrobat Help
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Editing the logical structure tree of Adobe PDF documents
Some tagged Adobe PDF documents might not contain all of the information necessary
for your document's contents to be fully accessible. For example, your tagged Adobe PDF
document might not contain alternative text for figures, specified languages for text, or
expansion text for abbreviations.To make your structured and tagged Adobe PDF
documents yield better results when their contents are repurposed, you can add this type
of information to their logical structure tree.
Note: Although Acrobat provides you with other means of editing your document's logical
structure tree, it's highly recommended that you don't edit it further than what's described
in this section unless you are an expert user of Acrobat. For further information on a
document's logical structure tree, see the technical note entitled TN 5406 included with the
Adobe Acrobat 5.0 Software Development Kit (SDK).
To add alternative text for a figure or specify a language for text:
1 Choose Window > Tags to display the logical structure tree. If the document doesn't
have a logical structure tree, the palette displays "No tags available."To expand an element
in the logical structure tree, click the symbol to the left of the element.
2 Do one of the following:
If you want to add alternative text for a figure, select an element in the logical structure
•
tree that is tagged as <Figure>.
If you want to specify a language for the text contained in a paragraph or another
•
element, select an element in the logical structure tree that is tagged as <Paragraph>
or select a different type of element that contains text.
3 Click the triangle in the upper right corner of the Tags palette to display the Tags palette
menu, and choose Element Properties from the menu. (If you have associated content
highlighting turned on, you must first turn this option off before you can select any other
command from the Tags palette menu.)
4 Do one of the following:
To add alternative text for a figure, enter text that describes the figure for Alternate Text.
•
For example, you might want to add alternative text that begins "A figure depicting"
and then describe what the figure depicts.The information that you add for Alternate
Text is read by a screen reader, so that users can be aware of what figures are shown in
the document.
To specify a language for the text contained in a paragraph or another element, choose
•
a language from the Language pop-up menu. For example, choose EN-US to specify for
the language to be U.S. English.The language attribute specified for an element at the
top level of the logical structure tree is inherited by all elements below it. In most cases,
you only need to specify a language when the language switches in your document, so
that the correct characters are used when repurposing the document's contents.
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