bug#31968: 26.1.50; Allow to hide title bar on maximize (gtk/gnome/csd)

[Robert Pluim]

Carlos Pita <carlosjosepita@gmail.com> writes:

> One simple possibility is to set/unset
> the _GTK_HIDE_TITLEBAR_WHEN_MAXIMIZED property. I think there is also a
> corresponding gtk api for that but maybe the property could be set using
> standard X machinery already exposed to elisp(?). Probably all this would
> be ineffective under waylan but it's simply enough to fix the problem for X
> with low effort.

This is not quite what you asked for, but have you tried:

(modify-frame-parameters nil '((undecorated t)))

Robert