PDF files have the option to let you share and comment on documents in a wide range of applications. Adobe Acrobat Reader and other free PDF programs offer a subset of the capabilities of the paid ...
You can save a OneNote notebook as a PDF, but if you update the notebook, those changes will not be reflected in the PDF.
Try Foxit Reader 4.3, which allows you to add text to any PDF. After installing the program, simply open your PDF in Foxit instead of Adobe Reader, then click Comments, Typewriter Tools, Typewriter ...
The markup tool in Safari lets you highlight text, add notes, insert your signature, and more. To access it on Mac, take a screenshot of the webpage or convert it into a PDF and use the Markup tool ...