When creating a PDF file using Adobe Acrobat DC Pro, a document author can specify that no part of an accessible PDF is to be copied, printed, extracted, commented on, or edited.
Problem is this security setting can interfere with a screen reader’s ability to read the document, because screen readers must be able to copy or extract the document’s text to convert it to speech.
How to fix accessibility permissions manually
1. Open the PDF in Adobe Acrobat DC Pro
2. Choose File > Properties > Security.
3. Choose No Security from the Security Method drop-down list.
4. Click OK and close the Document Properties dialog box.
Is your screen reader a Trusted Agent?
From Adobe: “If your assistive technology product is registered with Adobe as a Trusted Agent, you can read PDFs that might be inaccessible to another assistive technology product. Acrobat recognizes when a screen reader or other product is a Trusted Agent and overrides security settings that would typically limit access to the content for accessibility purposes. However, the security settings remain in effect for all other purposes, such as to prevent printing, copying, extracting, commenting, or editing text.”
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