There were a lot of changes in this area in org-mode version 8.0. I believe you updated from an older version 8.x version.
Here's info on the 8.0 upgrade: http://orgmode.org/worg/org-8.0.html There are many backward incompatible changes in that version. So you should read the above in full, especially if you are also using ox-latex and ox-html. The answer to your ox-beamer question is in the "Upgrading your setup" section; you now need to explicitly require ox-beamer using one of the two methods described there. On Nov 6, 2015 12:51 AM, "童俊翔" <tongjunxi...@gmail.com> wrote: I want to export org to beamer. It worked well previously when I press C-c C-e l O. But in recent days, when I press C-c C-e l, the options for beamer are missing. I can only export to pdf, not beamer. What’s the problem, and what can I do? Thanks a lot!
