Re: [macOS] Toggle fullscreen on Emacs26.1+ with undecorated frame option set to t

[Robert Pluim <rpluim@gmail.com>]

Boris Buliga <boris@d12frosted.io> writes:

> Hey folks,
>
> With the release of Emacs 26.1 there is an option to create undecorated
> frames
> (without title, toolbar etc). This is possible by adding following code to
> your
> init.el file:
>
>   (add-to-list 'default-frame-alist '(undecorated . t))
>
> Or, for testing purposes, you can run it by starting emacs with as follows:
>
>   $ emacs -q --execute "(add-to-list 'default-frame-alist '(undecorated .
> t))"
>
> After that, if you call toggle-frame-fullscreen, Emacs goes to native
> fullscreen
> mode and instead of resizing the frame to cover all screen it stays the same
> size as before toggling fullscreen, but with black space around.

I donʼt see this under X11, so itʼs probably specific to Mac. Your
best bet is probably to report an emacs bug using 'report-emacs-bug'.

Robert