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

Just paste this in *scratch* and evaluate (with C-j or C-x C-e):

(set-face-attribute 'default nil :height 150)

There's nothing wrong in putting this in the init file and commenting it out later, when you don't need it.