In this paper we describe a prototypical system that is able to generate document annotations based on eye movement data. Document parts can be annotated as being read or skimmed. We further explain ideas how such gaze-based document annotations could enhance document-centered office work in the future. Keywords Eye tracking, reading detection, line matching, OCR, document-centered office work General Terms Design, Measurement ACM Classification Keywords H.5.2 [User Interfaces]: Input devices and strategies