clim-utils again

[gwbennett]

Good day from Greg Bennett who is running sbcl-1.5.8 under linux mint 
19.2 64-bit
and mcclim code from  mcclim-20191008-get via quicklisp.

I would like to learn more about the coordinate system behind the &key 
arguments
left top right bottom in the call to make-application-frame. This seems 
to be a coordinate
system for a device which defaults to the full size of the root window, 
whatever that is.

As far as I can tell (some) details might be in the package clim-utils 
but this does not seem to
be part of the mcclim I am using. Pointers to its definition and to the 
device coordinate system
would be much appreciated.

Cheers /Greg