#+STARTUP: beamer

* Slide A
:PROPERTIES:
:BEAMER_act: <beamer>
:END:

I use
#+begin_example
:PROPERTIES:
:BEAMER_act: <beamer>
:END:
#+end_example

For slides I only want in the presentation and

* Handout
:PROPERTIES:
:BEAMER_act: <handout>
:END:

For slides I only want in the handout. With the new orgframe
environment as of now, the argument between the <> is not passed to
the frame and therefore lost.

* Slide B
I don’t know how often the orgframe is needed (I haven’t needed it in
the last years of making my presentations with org-mode), but wouldn’t
it be more sensible to write
#+begin_example
:PROPERTIES:
:BEAMER_env: orgframe
:END:
#+end_example
When you really do need it?

* Slide C
:PROPERTIES:
:BEAMER_act: <beamer>
:END:

This slide is included, too.

* Handout
:PROPERTIES:
:BEAMER_act: <handout>
:END:

This frame is exported as an =orgframe= with the correct =BEAMER_act=:

#+begin_example
:PROPERTIES:
:BEAMER_act: <handout>
:END:
#+end_example