GroupDocs.Annotation for Java is a flexible library built to extend document collaboration to the web. It allows end users to review, annotate and comment on over 50 types of documents. The library supports Microsoft Office and OpenDocument formats, PDFs, images, AutoCAD drawings and others. A rich set of tools allows users to draw lines, place watermarks and pointers, redact and comment text, strike through and underline it. And thanks to its cross-browser compatibility, the library lets users to annotate documents literally from any web-enabled device using just a browser and without having to install any third party software or plugins. The library has seen a number of improvements in the recent releases. In this article I’d like to introduce the most notable improvements.