When you use PDF files, you may find that you have to edit the file one way or another. Some also serve as editor programs, so you can edit any text or images in the file. However, you may also have to place notes on your PDF, whether reference notes, or for other reasons.

Just about all PDF Software allow you to place notes on your files, such as underlining and highlighting the text, or adding sticky notes, or even writing freehand if you want. Other than giving yourself reference notes, these annotations also let you give feedback if you happen to be collaborating with others.

XODO

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Adobe Acrobat Reader DC

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Foxit Reader

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PDF-XChange Viewer

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Expert PDF Reader

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Who Can Use This?

If you wanted to add your own handwritten notes to your PDFs, there are a number of features that allow you to do so, such as OCR software. Handwriting Recognition Software makes it more convenient to work with PDFs, such as being able to have your handwritten notes turned into editable text.

There are a number of people who could use these kinds of software. Most of these people would be those who spend a great deal of time working with text files, such as writers.

  • Editors – If you had to edit someone else’s work on a PDF, being able to add sticky notes and mark passages might be a good way to help do it. That way, you could add your own feedback in a way that could grab the writer’s attention without taking up more space on the text.
  • Readers – Or if you were just reading a PDF file, being able to annotate would be helpful for yourself, or for anyone else who would read the file. With all the options available for annotation, you could mark relevant passages by highlighting and underlining them, or add sticky notes if you had an idea about something that you want to remember.

OneNote

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Notebooks For Windows

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PDF Reader For Mac

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Xodo PDF Reader & Editor For Android

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PDF Annotator – Most Popular Software

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The Advantages of Writing by Hand

There are also a number of apps that allow you to write your notes by hand, if you want.
  • Actually writing each word by hand might help you better retain ideas in your head, as opposed to typing them down.
  • Many Handwriting Note Apps are also compatible with PDFs, so you could also make notes on your files by literally writing in the margins. This way allows you to make your notes as unique as you want, because now you can make more personalized notes than just what a PDF reader would allow you to do.
  • Doing this also gives you more time to think as you write, and since the writing is happening on a soft copy, you will not have to erase or strike it out as you would with writing on paper.
All these give you options as to how you want your PDF files annotated. You could use the features given on most PDF readers, since they already allow you to make annotations as you like. But if you want more flexibility, then you could use software that lets you work by hand, because then you could make your notes however you wanted.

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