Hi Hendri, thanks for your help. I still got a problem with the overlays. I wanted to combine it with crossing out terms from the equation, but it does not work out. I tried two variants: \pause and \onslide It seems that the \onslide command does not work together with the align-environment and the pause command is for some reason ignored. I attached a simplified example. Greetz Patrick > > > How can I replace a picture on a slide while I orate? A simple solution > > would be to add more slides with the same layout but different pictures, but > > I don't want the slide counter to skip. Furthermore on the handouts only the > > slide with the last pictures should be shown. > > Use \onslide and \rput to to place the pictures behind the content. > > \begin{slide}{title} > \onslide{1}{\rput[tl](-1,-1){\includegraphics[...]{...}} > \onslide{2}{\rput[tl](-1,-1){\includegraphics[...]{...}} > etc. > text > \end{slide} > > Determine the coordinates yourself. > > > In my presentation there is a equation with multiple terms. Since some of > > them are not relevant for my following investigation I want to cross out > > these terms. First I want to show the whole equation and after pressing a > > button the cross should appear on the slide. > > See pstricks. > > -Hendri. > _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/