--- doc/gphelp.in.orig 2020-09-21 00:29:25.000000000 -0600
+++ doc/gphelp.in 2020-10-19 15:06:32.498979687 -0600
@@ -43,8 +43,8 @@ $datadir= "@datadir@";
#
$wwwsite= "http://pari.math.u-bordeaux.fr/";
-$xdvi = $ENV{GPXDVI} || "xdvi";
-$xdviref = $ENV{GPXDVIREF} || "$xdvi -paper 29.7x21cm";
+$xdvi = $ENV{GPXDVI} || "xdg-open";
+$xdviref = $ENV{GPXDVIREF} || "$xdvi";
$gzip = "gzip";
$zcat = "$gzip -dc";
$bzip = "bzip2";