Select Code to Download

use strict;
use warnings;
...
        $mw->screenwidth, $mw->screenheight, $mw->depth,
        $mw->screenmmwidth, $mw->screenmmheight;
    };

$ screen_size
Screen is 3840 x 1200 x 24 pixels (1014 x 317 mm) (X11)
Screen is 3840 x 1200 x 24 pixels (1014 x 317 mm) (Tk)