In my terminal (I have terminator) I can use the key combinations Ctrl + and Ctrl - to increase / decrease the font size.
In emacs I can do the following to set the font-height:
(set-face-attribute 'default nil :height 70)
But I do not know how to increase / decrease it. How could I easily add this to my emacs configuration?
I think you want C-x C-+
or C-x C--
.