If you are wondering how to enable highlighting in PDF originating from a scanned paper, you may need to work with a PDF tool that has the OCR (Optical Character Recognition) feature. A scan is an image of the original piece of paper. If the PDF file originates from a scanned piece of paper, then the reason you can’t select text in PDF is that there is no “text” to highlight or select.
If you can’t select text in PDF, the reason could be one of the following: It is not uncommon for PDF users to deal with the “PDF won’t let me highlight” issue. 4. Highlight a specific word in PDF on Mac.3. How to highlight PDF on Windows 10 or earlier.
