PDF Annotator is a versatile software developed by GRAHL software design, designed to meet the needs of users seeking an intuitive and feature-rich tool for annotating PDF documents. Launched with the aim of providing users with a comprehensive solution for PDF annotation, PDF Annotator has gained popularity among professionals, educators, and students for its versatility, ease of use, and robust feature set. In this comprehensive review, we will delve into the core aspects of PDF Annotator, examining its key features, usability, and impact on document collaboration.