BEAMER_HEADER in `org-latex-classes'

["Sebastien Vauban" <sva-news-D0wtAvR13HarG/iDocfnWg@public.gmane.org>]

Hello,

In the `org-latex-classes' documentation (and in the Org Beamer documentation),
I don't see how to include or exclude lines passed through the #+BEAMER_HEADER
keyword.

  ╭────
  │ The header string
  │ -----------------
  │ 
  │ The HEADER-STRING is the header that will be inserted into the
  │ LaTeX file.  It should contain the \documentclass macro, and
  │ anything else that is needed for this setup.  To this header, the
  │ following commands will be added:
  │ 
  │ - Calls to \usepackage for all packages mentioned in the
  │   variables `org-latex-default-packages-alist' and
  │   `org-latex-packages-alist'.  Thus, your header definitions
  │   should avoid to also request these packages.
  │ 
  │ - Lines specified via "#+LATEX_HEADER:" and
  │   "#+LATEX_HEADER_EXTRA:" keywords.
  │ 
  │ If you need more control about the sequence in which the header
  │ is built up, or if you want to exclude one of these building
  │ blocks for a particular class, you can use the following
  │ macro-like placeholders.
  │ 
  │  [DEFAULT-PACKAGES]      \usepackage statements for default packages
  │  [NO-DEFAULT-PACKAGES]   do not include any of the default packages
  │  [PACKAGES]              \usepackage statements for packages
  │  [NO-PACKAGES]           do not include the packages
  │  [EXTRA]                 the stuff from #+LATEX_HEADER(_EXTRA)
  │  [NO-EXTRA]              do not include #+LATEX_HEADER(_EXTRA) stuff
  ╰────

Is there a solution for those lines?

Best regards,
  Seb

-- 
Sebastien Vauban