So I have noticed this issue with when using Preview to view pdfs. If a pdf has several pictures (esp. color), Preview seems to consume extraordinarily large amounts of memory when rendering the images in these pdf's. Recently I generated a power point presentation with 9 graphs (originally *.eps which were converted to *.jpg and then imported into power point). I then printed it as a pdf and the resulting pdf was only 20.8MB. When I view it with Preview, Preview consumes 1.54GB of Real Mem. This is with starting Preview afresh without having viewed other files prior or at the same time. This is absolutely absurd, and I was wondering if there is something I can do when generating pdf's to prevent this issue from coming up? Evidently I do not understand how pdf viewers work and why this much memory would be necessary. I have also noticed this issue with other image intensive (yet relatively small) pdf's. I just find it shocking to believe that it needs that much of the system resources to render such a puny image. Thanks!