A method and apparatus pertaining to annotating a document window on a display device of a computer-based system. An annotation window is displayed over a selected portion of the document window where the annotation window is defined by a transparent window area bounded by a border. The annotation window...http://www.google.ca/patents/US5893126?utm_source=gb-gplus-sharePatent US5893126 - Method and apparatus for annotating a computer document incorporating sound
