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It will make sure that you get the best results and the scanned PDF is highlighted. If it still is used make sure that the password has been applied to unlock the document. You need to make sure that the secure PDF is first of all not used in the process. Though no matter how advance the program is you still need the password to unlock the PDF. The fact is that if a PDF is secured then you cannot get the text highlighted. It is another important aspect that should be considered in this regard. If this is not done then be sure that your PDF file is not considering the scanned PDF as text, the real text is important for the program to work and therefore it must be there before highlighting it. Another important thing that can be done in this regard is text selection. Now it is again a myth as good PDF readers make sure that the highlighting is done no matter what. The other major reason is the fact that the PDF that is being highlighted has not been scanned properly. It is for the same reason that the scanning never happens. Scanned PDFs are not regarded as real text by most of the PDF annotators online and offline. Some reasons for which the PDF scanning is required are mentioned as following: There are reasons for which such software programs are developed.
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Why specialized software is required to highlight the scanned PDF.
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