bug#38187: 27.0.50; No mouse-wheel scaling on images

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Juri Linkov <juri@linkov.net>,  38187@debbugs.gnu.org
> Date: Sun, 17 Nov 2019 11:04:59 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > It is documented to increase/decrease the size of _text_ of the
> > default face.  It isn't documented to "zoom", which is a much more
> > general action/effect.
> 
> But I think it would make sense to bind that event to zoom the image if
> over an image.  It's a trivial change and seems natural.

AFAIU, that's not what the OP wanted.  He wanted to see _all_ images
be scaled proportionally to the text scaling, regardless of where the
mouse pointer is located.