Dear Hans, I have presentations that include buffers typeset with \typesetbuffer. One of the presentation includes 33 buffers, which are small ConTeXt samples. Any time I change anything on the presentation (not on the buffers themselves), every buffer is typeset again. And the compilation time is longer than probably desired. My first suggestion would be to skip compiling buffers again, if the following three requirements are met: 1. Buffer content (.tmp file, I guess) is identical (checked with a hash) with the previous one from last compilation. 2. PDF file hasn’t been changed since previous complete compilation (md5 sum again). 3. Buffer content was correctly compiled in previous compilation. My second suggestion may be a bit complex to implement, but I think it would be useful. Wouldn’t it be possible that the fonts are only embedded one in the presentation? Many thanks for your help, Pablo -- http://www.ousia.tk