Abstract: A pen-based computer copy editing apparatus includes a pressure sensitive screen for displaying original text having page breaks thereon; a pen for writing on the screen by applying pressure thereon; and a CPU for (a) identifying handwriting and gestures corresponding to insertions and deletions of portions of the original text and identifying the insertion of typesetting codes and author queries, in response to pressure applied by the pen on the screen, (b) controlling the screen to display the inserted text corresponding to the handwriting in a handwritten font different from the typewritten font already displayed on the screen such that the inserted text is discernable from screen text in the typewritten font, (c) controlling the screen to display the deleted text in the typewritten font with a strike-out therethrough, such that the deleted text is discernable from unmodified screen text in the typewritten font, (d) controlling the screen to display the typesetting codes in a particular font, (e) controlli