Adobe Acrobat XI - Manual (Page 480)

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Accessibility, tags, and reflow
Last updated 1/14/2015
Whichever method you use to tag the PDF, use Acrobat to touch up the tagging and reading order for complex page
layouts or unusual page elements. For example, the Add Tags To Document command can’t always distinguish between
instructive figures and decorative page elements such as borders, lines, or background elements. It may incorrectly tag
all of these elements as figures. Similarly, this command may erroneously tag graphical characters within text, such as
drop caps, as figures instead of including them in the tag that represents the text block. Such errors can clutter the tag
tree and complicate the reading order that assistive technology relies on.
If you tag a document from within Acrobat, the application generates an error report after it completes the tagging
process. Use this report as a guide to repair tagging problems. You can identify other tagging, reading order, and
accessibility problems for any PDF by using the Full Check tool or the Touch Up Reading Order tool. For more
information, see
Check accessibility with Full Check and Check and correct reading order (Acrobat Pro) .
Create a tagged PDF from a web page
A PDF that you create from a web page is only as accessible as the HTML source that it is based on. For example, if the
web page relies on tables for its layout design, the HTML code for the table may not flow in the same logical reading
order as a tagged PDF would require, even though the HTML code is sufficiently structured to display all the elements
correctly in a browser.
Depending on the complexity of the web page, you can do extensive repairs in Acrobat Pro by using the Touch Up
Reading Order tool or editing the tag tree in Acrobat.
To produce the most accessible PDFs from web pages you create, first establish a logical reading order in their HTML
code. For best results, employ the Web Content Accessibility Guidelines that are published by theWorld Wide Web
Consortium (W3C). For more information, see the guidelines on the W3C website.
1 Do one of the following:
• In Acrobat, choose File > Create > PDF From Web Page, enter the web page address, and then click Settings.
• In Microsoft Internet Explorer, in the Adobe PDF toolbar, click the Down Arrow on the Convert button and
choose Preferences.
2 In the General tab, select Create PDF Tags, and then click OK.
3 Specify any other options as appropriate, and then click Create.
Creating a tagged PDF from an authoring application
In most cases, you create tagged PDFs from within an authoring application, such as Adobe FrameMaker®, Adobe
InDesign, or Microsoft Word. Creating tags in the authoring application generally provides better results than adding
tags in Acrobat.
PDFMaker provides conversion settings that let you create tagged PDFs in Microsoft Excel, PowerPoint, and Word.
For more information about creating accessible PDFs, see www.adobe.com/accessibility .
For more information, see the documentation for your authoring application.
About tags in combined PDFs
You can combine multiple files from different applications in one operation to create a single PDF. For example, you
can combine word-processing files with slide presentations, spreadsheets, and web pages. Choose File > Create >
Combine Files Into A Single PDF.
During conversion, Acrobat opens each authoring application, creates a tagged PDF, and assembles these PDFs into a
single tagged PDF.