PDFill PDF Comment, Markup or Annotator lets the user open PDF file and add stamping, commenting, annotating and marking directly on the PDF document. Free PDF Writer The PDF Comment associates an object such as a note, or movie with a location on a page of a PDF document, or provides a way to interact.
to buy an expensive program to add comments or notes to a PDF. using Apple's free application, Preview (in your /Applications folder).
Free PDF Annotator software to highlight, underline, strike out, add text to PDF for free. Annotate means to add notes as an explanation, or comment.
Add notes to pdf free - josemiguel