Configure the org-emphasis-alist variable with Mx customize-variable . Locate the entry in the list where the "marker sign" is + and select the "Font-lock-face" option in the "Value" pop-up menu. Enter the value of the face of your choice, whose exact appearance you can adjust in the usual way, for example, using Mx customize-face .
Or, more succinctly:
(require 'cl) ; for delete* (setq org-emphasis-alist (cons '("+" '(:strike-through t :foreground "gray")) (delete* "+" org-emphasis-alist :key 'car :test 'equal)))
user4815162342
source share