What is PDF Annotation? Annotating PDF files is an essential skill for collaboration, review, and seamless communication in both professional and educational workflows. PDF annotations allow you to draw over, highlight, label, or otherwise “annotate” the document without modifying the existing content. Why Annotate PDF Files? A common use case would be for gaining feedback […] The post How to add annotations to a PDF file appeared first on Java PDF Blog and was written by Jacob Collins.