I used orgmode to prepare my lecture materials.
Now I upgrade org to the latest version, and read the [[new
exporter][https://orgmode.org/worg/exporters/ox-overview.html]].

It seems the configure is much easier.
But I cannot get my lectures right after all my efforts.

So I start all over. I removed all my beamer configure.
With the [[beamer
example][https://orgmode.org/manual/A-Beamer-example.html]], I get a pdf
(see attachment) like a latex article, no beamer frame.

Is this normal?