An apparatus and method for highlighting information between conference participants in a computer conferencing system is disclosed. In a computer conferencing system including a first participant coupled to a second participant via a communication medium, the first participant having a first display,...http://www.google.co.uk/patents/US5909213?utm_source=gb-gplus-sharePatent US5909213 - Remote highlighting of objects in conferencing system by logically anding a highlight bitmap and a foreground bitmap
