Automatically Tagging Untagged Documents; Types Of Pdf Documents; Image Only Files - Adobe 22020772 User Manual

and there are keyboard shortcuts for many actions. Each of the sections on JAWS and Window-Eyes in this
guide provides information on keystrokes specific to that screen reader. More information on Adobe Reader
keyboard shortcuts is available at http://www.adobe.com/enterprise/accessibility/reader/appx_a.html.
The following keystrokes are helpful for getting started with PDF documents:
•
Ctrl+Page Down or Ctrl+Page Up -- Go to the next or previous page
• Shift+Ctrl+Page Down or Shift+Ctrl+Page Up -- Go to the bottom or top of the document
• Ctrl+K -- Open the Preferences dialog box
•
Ctrl+D -- Display document properties, including security
settings and tagged status that affect accessibility
• Shift+Ctrl+6 -- Start Accessibility Quick Check
•
ALT + F and then V -- Save to text
• ALT-D and then T -- Start Accessibility Setup Assistant
• F5 -- Place focus on document

Automatically tagging untagged documents

When you open a PDF document that is not tagged, Adobe Reader analyzes the document and
automatically adds tags to improve the reading order. These tags are only temporary, and must be
added each time the PDF document is opened. When you open an untagged PDF, Adobe Reader
asks you to choose one of three reading order options. This dialog box explains that your screen
reader will not be able to interact with Adobe Reader during the tagging process, and it provides
the number of pages in the document to give you an idea of how long the tagging will take.

Types of PDF Documents

Though PDF is a standard, the content and structure of PDF documents vary widely. This
section describes how accessibility is affected by four types of PDF documents: image
only files, untagged documents, tagged documents, and electronic forms.

Image only files

Image only PDF files present significant accessibility barriers for screen reader users. These files are inaccessible
because they contain only graphic images representing each page instead of actual text characters. Although text
may appear on the screen, it is only a picture of text without the underlying characters needed by a screen reader
Image only PDF files are created when a user scans a paper document, producing an image of the document.
The scanning process is similar to how a blind person uses a scanner along with optical character recognition
(OCR) software to read print materials. However, because OCR has not been performed on the document,
the result is an image only file. Although authors can use Adobe Acrobat to perform OCR when creating PDF
documents, many skip the OCR process because it takes more time than simply distributing the document as it
appears in the document window. Another reason that authors may skip OCR is that, depending on the quality
of the image, the resulting text can contain recognition errors, which require manual proofreading to resolve.
Accessing PDF Documents with Assistive Technology
Types of PDF Documents
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