Subject: bug#38699: Simple keystrokes to change font size

From: Eli Zaretskii <[email-masked]>
Date: Sat, 21 Dec 2019 16:21:34 +0200

> From: 積丹尼 Dan Jacobson
>  <[email-masked]>
> Date: Fri, 20 Dec 2019 07:59:54 +0800
> 
> In emacs there is no way to simply say "make the font bigger, now" like
> one can do in browsers. Emacs wants to know what font you wish to make
> what size. One cannot just tell emacs "the current font" and "the next
> bigger size".
> 
> So there ought to be keys provided to do that.

There are: "C-x C-+" and "C-x C--".  In Emacs 27, there's also
C-wheel-up and C-wheel-down.