bug#24579: [PATCH] borderless windows on OS X

[martin rudalics <rudalics@gmx.at>]

 > There are two popular Emacs patches for OS X that make all its windows
 > have no title bar:
 >
 > https://github.com/nikhilunni/BorderlessEmacs
 >
 > https://github.com/gwydirsam/emacs-mac-borderless
 >
 > This patch integrates these by providing a variable
 > (ns-use-titled-windows) that allows this decision to be controlled at
 > runtime. The default is to use titles, like normal.

Thank you.  I have a couple of questions:

(1) Is there a way to mix behaviors in one and the same session - that
is have at the same time a window with a title bar and one without?
It's possible under X and Windows as can be seen with tooltip frames.

(2) Is there an option to draw borders and, if so, borders of different
width on a borderless frame?  Latter are available via X but not on
Windows.

(3) IIUC setting your option does not toggle titles/borders on existing
frames.  Would it be possible to do so?  We could do that on Windows but
it seems impossible with GNU/Linux window managers.

Thanks again, martin