Arash Esbati <arash@gnu.org> writes:

> Thanks, that works.  Now I have this in my .emacs and 'C-x 8 e +' works
> as expected:
>
>     (set-fontset-font t 'emoji
>                       (font-spec :family   "Segoe UI Emoji"
>                                  :registry "iso10646-1")
>                       nil 'prepend)
>
>     (add-to-list 'face-font-rescale-alist
>                  '("Segoe UI Emoji" . 0.93)
>                  t)

Following up myself, I'm facing a strange behavior with the code above
in combination with:

    (setq inhibit-splash-screen t)

I started Emacs with a minimal .emacs like this:

--8<---------------cut here---------------start------------->8---
;;;                                 -*- lexical-binding: t; -*-

(set-fontset-font t 'emoji
                  (font-spec :family   "Segoe UI Emoji"
                             :registry "iso10646-1")
                  nil 'prepend)

(add-to-list 'face-font-rescale-alist
             '("Segoe UI Emoji" . 0.93))

(setq inhibit-splash-screen t)

(custom-set-faces
 '(default ((t (:family "Source Code Pro Medium" :foundry "outline" :slant normal :weight medium :height 90 :width normal)))))
--8<---------------cut here---------------end--------------->8---

Then I hit 'C-x 5 2' and the new frame is opened with Arial and not with
Source Code Pro like this: