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With a default PDF reader like Preview on the Mac, finding a certain word in the PDF is difficult and editing a document can be almost out of the question. Without knowing which tools to use, it will be very hard to make changes to a PDF document. Fortunately, there are plenty of PDF apps to help you get the editing job done
PDF files are commonly used when sharing documents with colleagues or friends. Companies often use PDF files to share textual data, such as reports, agreements, research, etc. Considering sensitive and private information that others can find in the PDF document, before sharing a PDF file, you may need to check the document for sensitive content or to trace your private information
If you've ever tried to edit a Portable Document File, or PDF, you've almost certainly discovered that it's a lot more trouble than editing a Microsoft Office document. That's because the PDF format was never designed to be edited at all. A PDF was supposed to be a virtual printout, the on-screen equivalent of hard copy