bug#39847: Document how users can make text-zoom keys same as browser

[Richard Stallman]

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  > > The reader might be wondering "Why can't I directly do C-+ like in my
  > > browser? Why do I have to do C-x C-+? C-+ is unbound in emacs.

  > We don't explain the rationale for key bindings in the manual, and I
  > don't think we should start doing that now.

I agree about that -- but I also wished that C-+ and C-- would scale
the screen, just a few months ago.

Perhaps we don't need C-- to make the argument negative.  Perhaps
it is enough that M-- does that.



-- 
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)