Hi Uwe, > Now I took the example > https://orgmode.org/manual/A-Beamer-example.html#A-Beamer-example > > And wanted to export it to beamer but obtained the message > user-error: Unknown LaTeX class ‘beamer’
This sounds to me like you are using the latex exporter, rather than the beamer one. After (require 'ox-beamer) then C-c C-e l b works well on the example for me. Josiah
