Dear Hendri Thanks for your help. By trial and error I got my slides working as follows: I have to add [method=file] to _all_ slides that have _either_ overlays or listings. It doesn't work just to put a \pdsetup after the \maketitle. But ... lf and rf have to appear in the preamble and thus a footer appears on the title slide. Is there anyway to get rid of it like I use \thispagestyle{empty} in regular LaTeX documents?? Moti -- Prof. Mordechai (Moti) Ben-Ari Department of Science Teaching Weizmann Institute of Science http://stwww.weizmann.ac.il/g-cs/benari