1 #+property: header-args :var foo=1
2 #+property: header-args+ :var bar=2
8 * overwriting a file-wide property
10 :header-args: :var foo=7
13 #+begin_src emacs-lisp
17 * appending to a file-wide property
19 :header-args+: :var baz=3
22 #+begin_src emacs-lisp