Hello,

I would like to extend the org-mode markup.
For example, I would like to change the face of a keyword, say: :next: .
Whenever :next: is displayed from an org-mode buffer, it should show up in using an arbitrary face.

I tried this:

  (defun org-add-my-extra-markup ()
    (add-to-list 'org-font-lock-extra-keywords
      '("[^\\w]\\(:next:\\)[^\\w]"
         (1 font-lock-warning-face t))))

  (add-hook 'org-font-lock-set-keywords-hook #'org-add-my-extra-markup)

But it does not work.

So: how to extend org-mode markup?

Many thanks,
PHF