Ar an cúigiú lá de mí na Nollaig, scríobh René Rebe: 
 >   > Googling around suggest others alternative forms which
either do
 >   > not work in xemacs-beta, or do not prove the situation.
 >   >
 >   > I tried to read the lisp files, but could not find anything that
 >   > would help me there either.
 >   >
 >   > Is there anything "pt" like so that a 13pt would result in say 13
 >   > pixels on a low resolution display, and 26 (or whatever) pixels on
 >   > a HiDPI screen with the X server dpi set accordingly?
 >   >
 >   > PS: Surprisingly the Xemacs menus and such sale automatically, just
 >   > not this most important, main edit buffer, ..?
 > 
 > ... except this suggests it does!?
 > 
 > Xft isn’t my bailiwick, and I don’t have a high-DPI screen available to
 > reproduce ± debug this issue. Stephen?
 
 With an xserver, you could just run "xrandr --dpi 192" or so to 
 "simulate" a "HiDPI" screen, ... 
Ah, thanks for that. My Apple XQuartz 2.3.6 xorg-server 1.4.2-apple56
doesn’t support the XRANDR extension, so it would likely be a question of a
virtual machine for me. I don’t use the Xft support and have made the
decision to favour the GTK support for my gui work.
-- 
‘As I sat looking up at the Guinness ad, I could never figure out /
How your man stayed up on the surfboard after forty pints of stout’
(C. Moore)