BEAMER commands don't work when exporting org-mode to beamer

Question

I'm trying to produce a minimalistic presentation using org-mode and beamer latex.

But I keep getting a pdf file with only one frame, and "I think" commands starting with BEAMER_ is not working.

Using the following code, I expect to have a presentation with 3 frames with Madrid theme. However, I get a one frame presentation with default beamer theme.

#+AUTHOR: Sameh
#+OPTIONS: H:2 toc:t num:t
#+LATEX_CLASS: beamer
#+LATEX_CLASS_OPTIONS: [presentation]
#+BEAMER_THEME: Madrid
#+COLUMNS: %45ITEM %10BEAMER_ENV(Env) %10BEAMER_ACT(Act) %4BEAMER_COL(Col) %8BEAMER_OPT(Opt)
#+BEAMER_FRAME_LEVEL: 2

** Frame 1
 some text here
*** headings 1
*** headings 2

** Frame 2
some text here
*** headings 1
*** headings 2

** Frame 3
some text here
*** headings 1
*** headings 2

If I change #+BEAMER_THEME: Madrid to #+latex_header: \mode<beamer>{\usetheme{Madrid}}, the theme will work.

I "think" #+BEAMER_FRAME_LEVEL: 2 and #+BEAMER_THEME: Madrid are not recoginsed, and it maybe the thing causing the problem.

I need to know how to make #+BEAMER_THEME: Madrid work? and how to make presentation provide multiple frames?

Answer 1

Apparently, this happened because I was publishing to pdf using usual latex pdf using CTRLc + CTRLe + l+p, with small p, where it should be CTRLc + CTRLe + l+P with capital P for beamer pdf publishing.