Currently press [TAB] key in `org-set-tags-command` will provide current buffer tags as completion candidates. This is very less. I suggest providing all tags in candidates. Here is a modification. #+begin_src diff modified lisp/org.el @@ -12254,12 +12254,7 @@ (defun org-fast-tag-selection (current inherited table &optional todo-table) (when exit-after-next (setq exit-after-next 'now))) ((= c ?\t) (condition-case nil - (setq tg (completing-read - "Tag: " - (or buffer-tags - (with-current-buffer buf - (setq buffer-tags - (org-get-buffer-tags)))))) + (setq tg (completing-read "Tag: " (org-global-tags-completion-table))) (quit (setq tg ""))) (when (string-match "\\S-" tg) (cl-pushnew (list tg) buffer-tags :test #'equal) #+end_src The Org Mode has `org-tag-alist` for user to setting default fast-selection tags group. I don't know whether function `(org-global-tags-completion-table)` already merged with `org-tag-alist`. It seems only get tags from all Agenda files after I checked out its source code. [stardiviner] GPG key ID: 47C32433 IRC(freeenode): stardiviner Twitter: @numbchild Key fingerprint = 9BAA 92BC CDDD B9EF 3B36 CB99 B8C4 B8E5 47C3 2433 Blog: http://stardiviner.github.io/