Variable: org-num-format-function
org-num-format-function is a customizable variable defined in
org-num.el.gz.
Value
org-num-default-format
Documentation
Function used to display numbering.
It is called with one argument, a list of numbers, and should
return a string, or nil. When nil, no numbering is displayed.
Any face text property on the returned string overrides
org-num-face.
This variable was added, or its default value changed, in Org version
9.3.
Source Code
;; Defined in /usr/src/emacs/lisp/org/org-num.el.gz
(defcustom org-num-format-function #'org-num-default-format
"Function used to display numbering.
It is called with one argument, a list of numbers, and should
return a string, or nil. When nil, no numbering is displayed.
Any `face' text property on the returned string overrides
`org-num-face'."
:group 'org-appearance
:package-version '(Org . "9.3")
:type 'function)