Ihor Radchenko writes: > This is because Org makes use of invisible text property during > fontification. You should either apply invisibility in Org through > font-lock, or do it temporarily until next re-fontification via > (with-silent-modifications (add-text-properties 1 3 '(invisible t))) Thank you so much! At some point I figured I had to actually study font-lock and I did solve it, with font-lock-add-keywords. Enrico