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@@ -634,6 +634,9 @@ HorizScrollDelta parameters.
To disable vertical or horizontal scrolling, set VertScrollDelta or
HorizScrollDelta to zero.
.
+To invert the direction of vertical or horizontal scrolling, set
+VertScrollDelta or HorizScrollDelta to a negative value.
+.
.LP
Acceleration is mostly handled outside the driver, thus the driver will
translate MinSpeed into constant deceleration and adapt MaxSpeed at