Subject: maybe implement CTRL++ to zoom text

From: 積丹尼 Dan Jacobson <[email-masked]>
Date: Tue, 22 Aug 2017 11:05:40 +0800

In most browsers, CTRL++ zooms text,
making it progressively bigger.
In emacs, one just gets
"C-= is undefined".

(CTRL+-, the reverse action, is bound to
negative-argument.)

Anyway, no matter what binding or not, there is apparently not command
yet to simply zoom text like in a browser. The best one can do is the
methods mentioned in (info "(emacs) Fonts").