Adobe Acrobat Section 508 Class
Notes and Examples
"Remember that Adobe acrobat is not an editing tool, word processor, or desktop publishing application."
Accessible and Usable PDF Documents Techniques for Document Authors (PDF, 800 pages, 3rd Edition, 2011, FREE) from Karlen Communications
"As an operational matter, the process of assuring that content is accessible involves substantial training, adequate software and sufficient staff-time."
Using PDF/UA in accessibility checklists
"When it comes to accessibility, you simply must be checking the readability of everything you want your audience to read and comprehend."
If you want to talk about Accessibility, then we need to talk about Readability issues.
- Download class files: PDF_Exercises (Zip, 2Mb, to a "Class Files" folder anywhere you wish)
- Create a"Results Folder" inside.
- Online Sample files
- Portrait of Promise: The California Statewide Plan to Promote Health and Mental Health Equity (PDF, 11MB, Example of PDF accessibility work from Tagged PDF)
- World Report on Disability - World Health Organization(PDF, 1.6MB)
- Create Accessible Digital Products » Create Accessible PDFs(Section508.gov)
- Accessibility Examples & Tests IDHS: Accessibility Examples & Tests
- Online Order Form(PDF, 230KB)
- Information Request Form(PDF, 130KB)
- Accessible PDF Demo Document (Word .docx, 367KB)
- World Report on Disability - World Health Organization (PDF, 1.5KB)
- How to Find Errors in PDF Training Document HHS (PDF, 216KB)
- Web Accessibility Checklist (.docx, 60KB)
- PDF Reference, Sixth Edition, Version 1.7
- Everything below (the following four items) is optional depending on your situation, except to take a deep breath and relax!
- Download and install: Colour Contrast Analyser (Free, Mac & Windows)
- Download and install: PDF Accessibility Checker (PAC 3) (Zip, 26.5MB, Free Windows only)
- Download and install: CommonLook® PDF Validator (59MB, Free, Windows only)
- Download and install: pdfGoHTML (Free, Mac & Windows)
Notes and Examples
- An overview of PDF inaccessibility (The Paciello Group)
- There are three basic ways content in a PDF is rendered.
- The first is how content is presented to the end user. This is the primary purpose of PDFs: displaying electronic print output on your computer screen.
- The second is how content is organized based on the way the document looks when you’re looking at it on the computer.
- The last way is optional. Defined tags can provide meaning to those tokens I mentioned earlier.
1.6 Why is it Necessary to Fix PDF Files? (page 3)
Of the 136 tests described in the Matterhorn Protocol (PDF, 340Kb), 87 may be fully automated with software. Human intervention is only required to assess and correct any errors located by software. 136 - 87 = 49
The 47 checks that may require human judgement boil down to:
- Confirming that the document’s semantics as indicated by the tags are accurate
- Confirming that the order of semantic content is logical
- Confirming that any role-mappings in use are valid
- Several checks that apply equally to other forms of content
- alternate text for images
- General Considerations:
- Alternative Text/Text Descriptions of Non-Text Content
- Accessible Table Creation, Data Tables
- Meaningful Link Text
- Images, Charts and Graphs
- Forms, Buttons, Checkboxes, and Other Interactive Controls
- Example Variations:
Reflowing a flexible PDF file (Standard and Pro)
Let's take a quick look at how flexible a tagged PDF file is.
First, adjust the size of the document window to mimic the smaller screen of a handheld device.
- Choose View > Zoom > Actual Size to display the document at 100%.
- Resize the Acrobat window to about 50% of the full-screen display.
Choose View > Zoom > Reflow.
The content of the document is reflowed to accommodate the smaller document screen, and you can now read an entire line of text without using the horizontal scroll bar.
- In Windows, click the Maximize/Restore Down button if the window is currently maximized; if the window isn’t maximized, drag a corner of the application window to reduce it. In Mac OS, resize the document pane by dragging a corner. Your goal is to resize the Acrobat window so that the ends of the sentences in the document pane are cut off.
Choose 400% from the magnification menu in the Page Controls toolbar.
Scroll down the page to see how the text reflows.
- When you reflow text, artifacts such as page numbers and page headers often drop out because they are no longer relevant to the page display. Text is reflowed one page at a time. You cannot save the document in the reflowed state. Now you’ll examine how the display changes when you change the magnification.
- Again, because the text is reflowed, you don’t have to use the horizontal scroll bar to move back and forth across the page to read the enlarged text. The text is automatically contained within the document pane.
When you’ve finished viewing the reflowed text, restore the Acrobat document window to its usual size,