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Tagging these pages by using the Add Tags To Document command can result in improperly combined elements or out-of-sequence tags. These elements include closely spaced columns, irregular text alignment, nonfillable form fields, and tables that don’t have borders. However, it cannot always correctly interpret the structure and reading order of complex page elements. The Add Tags To Document command adequately tags most standard layouts. It also creates tags for any links, cross-references, and bookmarks that you added to the document in Acrobat. Then, it builds a tag tree that reflects that information. Acrobat analyzes the content of the PDF to interpret the individual page elements, their hierarchical structure, and the intended reading order of each page. This command works on any untagged PDF, such as one created with Adobe PDF Printer.
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To tag a PDF in Acrobat, choose Tools > Accessibility > Add Tags To Document. Tagging during conversion can also properly tag the links, cross-references, bookmarks, and alternate text (when available) that are in the file. This tagging can more readily interpret the structure of complex layouts, such as embedded sidebars, closely spaced columns, irregular text alignment, and tables. The logical structure tree reflects an accurate reading order and appropriate levels of tags. Tagging during conversion enables the authoring application to draw from the paragraph styles or other structural information of the source document to produce a logical structure tree. Tagging during conversion to PDF requires an authoring application that supports tagging in PDF. If you do not have access to an authoring application that can generate a tagged PDF, you can tag a PDF any time by using Acrobat. Examples of these applications include Adobe FrameMaker®, Adobe InDesign®, Microsoft Word, or OpenOffice Writer. With a tagged PDF, the logical structure tree sends the contents to a screen reader or other assistive software or hardware in an appropriate order.įor best results, tag a document when converting it to PDF from an authoring application. If a PDF doesn’t contain tags, Acrobat attempts to tag it automatically when users read or reflow it, and the results may be disappointing. Improve the accessibility of PDFs by adding tags in Acrobat. Additional checks in the Preflight tool.Analyzing documents with the Preflight tool.Automating document analysis with droplets or preflight actions.Correcting problem areas with the Preflight tool.Viewing preflight results, objects, and resources.PDF/X-, PDF/A-, and PDF/E-compliant files.Playing video, audio, and multimedia formats in PDFs.Add audio, video, and interactive objects to PDFs.
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