A common method for making PDF documents is to place a paper copy of a document into a scanner and view the newly-scanned document as a PDF with Adobe Acrobat. Unfortunately, scanners only create an image of text, not the actual text itself. This means the content is not accessible to users who rely on assistive technology. Additional modifications must be made to make the document accessible.
If the PDF document is not a scanned document or it has previously undergone optical character recognition (OCR), skip this discussion and proceed to “Step 4: Add Form Fields and Set the Tab Order.”