Systems and methods for sharing document annotations. A document is displayed on a graphical user interface and first annotation information for the document is created by a first user, the annotation information including first annotations and positioning information for positioning a first overlay window relative to the document. The first overlay window with the first annotations is displayed over the document wherein the document is visible through the first overlay window. The annotation information is sharable with other users, whereby a different user is able to display the overlay with annotations made by the first user over the document on a different system, and the annotations do not modify the underlying document.