emacs zoom in/out globally

Question

I know that I can zoom in/out using C-x C-+, but this applies only to the current file. Once I open another one, the text goes back to the default value and it\'s really tiresom

Answer 1

This piece of code modify the zoom in/out functionality to apply the commands to every buffer. That should achieve what you are trying to do.

(defadvice text-scale-increase (around all-buffers (arg) activate)
  (dolist (buffer (buffer-list))
    (with-current-buffer buffer
      ad-do-it)))