Question may be very dumb, but I can't find the answer on the web :

I have a command C-u 80 M-x column-marker-1, and I want it to be launched automatically on every buffer I open. What should I add to my ~/.emacs.d/init.el to do that ?

Here is where column-marker-1 is defined : https://www.emacswiki.org/emacs/column-marker.el


The emacs wiki page at : https://www.emacswiki.org/emacs/ColumnMarker

gives an example for a hook:

Highlight column 80 in foo mode:

(add-hook 'foo-mode-hook (lambda () (interactive) (column-marker-1 80)))
  • I don't understand how to use it exactly. I was able to add it to major mode (such as c-mode or emacs-lisp-mode) but I would like to have this enabled everytime, and writing one line for every existing major mode seems pretty dirty. I tried to add a hook to column-number-mode(which is a minor mode always enabled by (setq column-number-mode t)), but it did nothing. I can add it to a self created minor mode (defined by (define-minor-mode col80 "foobar"),but I don't know how to automatically launch my minor mode (hence I'm just moving the problem). – Motiss Jan 2 at 11:22
  • have a look at stackoverflow.com/questions/7899949/… – manandearth Jan 2 at 11:24

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