> I want to plot a square / circle over a graph (in pdf format) to > highlight certain sections. I rmember that it is possible, but I do
maybe there is an easier way... but what I usually do is use pstricks with powerdot (I assume you can use the same technique with beamer) and then after I insert my graphic I add in a \psgrid to find the coordinates and then I put in a \psframebox or \psellipse where I want to highlight.
