[PATCH] make wording of ScrollDelta options clearer

[Zsolt Dollenstein]

---
 man/synaptics.man | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/man/synaptics.man b/man/synaptics.man
index 76756be..3eeef84 100644
--- a/man/synaptics.man
+++ b/man/synaptics.man
@@ -154,12 +154,18 @@ Enable horizontal scrolling when dragging with two fingers anywhere on
 the touchpad. Property: "Synaptics Two-Finger Scrolling"
 .TP 7
 .BI "Option \*qVertScrollDelta\*q \*q" integer \*q
-Move distance of the finger for a scroll event. Property: "Synaptics Scrolling
-Distance"
+Distance (in device coordinates) the finger has to move for a vertical
+scroll event. Negative value inverts scroll direction. The bigger the
+absolute value, the slower the scroll effect. A value of 1 means
+maximum scrolling speed, -1 means maximum speed in reverse
+mode. Property: "Synaptics Scrolling Distance"
 .TP 7
 .BI "Option \*qHorizScrollDelta\*q \*q" integer \*q
-Move distance of the finger for a scroll event. Property: "Synaptics Scrolling
-Distance"
+Distance (in device coordinates) the finger has to move for a
+horizontal scroll scroll event. Negative value inverts scroll
+direction. The bigger the absolute value, the slower the scroll
+effect. A value of 1 means maximum scrolling speed, -1 means maximum
+speed in reverse mode. Property: "Synaptics Scrolling Distance"
 .TP
 .BI "Option \*qMinSpeed\*q \*q" float \*q
 Minimum speed factor. Property: "Synaptics Move Speed"
-- 
2.0.0