Re: Elisp and overlay, how to show an image

[Stefan Monnier via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>]

> I didn't know that (put-image) will return the overlay it created.

Indeed, I see that the docstring doesn't mention it, although the code
does it quite explicitly (i.e. not by accident).  Seems like a docstring bug.

> Is there a way to set a bottom margin to the added overlay, or to the
> image, like with CSS on a web page ? Or do I need to add more "\n" with
> (overlay-put) ?

I'm not very knowledgeable about images, to be honest.  If that doesn't
offer any useful options, you should be able to "similate" a bottom
margin by putting a `face` property on the "\n" string with an
appropriate `:height`, something like

    (overlay-put ol 'affer-string
                    (propertize "\n" 'face '(:height 2.5)))


- Stefan