Variable: org-columns-checkbox-allowed-values
org-columns-checkbox-allowed-values is a customizable variable defined
in org-colview.el.gz.
Value
("[ ]" "[X]")
Documentation
Allowed values for columns with SUMMARY-TYPE that uses checkbox.
The affected summary types are "X%", "X/", and "X" (see info node (org)Column attributes).
This variable was added, or its default value changed, in Org version
9.6.
Source Code
;; Defined in /usr/src/emacs/lisp/org/org-colview.el.gz
;;; Configuration
(defcustom org-columns-checkbox-allowed-values '("[ ]" "[X]")
"Allowed values for columns with SUMMARY-TYPE that uses checkbox.
The affected summary types are \"X%\", \"X/\", and \"X\" (see info
node `(org)Column attributes')."
:group 'org-properties
:package-version '(Org . "9.6")
:type '(repeat (choice
(const :tag "Unchecked [ ]" "[ ]")
(const :tag "Checked [X]" "[X]")
(const :tag "No checkbox" "")
(const :tag "Intermediate state [-]" "[-]")
(string :tag "Arbitrary string"))))