--- ./xset.man.orig	2006-11-09 04:47:43.000000000 +0100
+++ ./xset.man	2006-11-09 18:21:16.000000000 +0100
@@ -174,6 +174,13 @@
 given, it will be interpreted as the acceleration.
 If no parameters or the flag 'default' is used, the system defaults will
 be set.
+
+If the `threshold' parameter is provided and 0, the `acceleration'
+parameter will be used in the exponent of a more natural and continous
+formula, giving precise control for slow motion but big reach for fast
+motion, and a progresive transition for motions in between.
+Recommended `acceleration' value in this case is 3/2 to 2, but not
+limited to that range.
 .PP
 .TP 8
 .B p