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-rw-r--r--man/synaptics.man14
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diff --git a/man/synaptics.man b/man/synaptics.man
index 7083b3a..65fb337 100644
--- a/man/synaptics.man
+++ b/man/synaptics.man
@@ -518,6 +518,20 @@ initialized if
.B Option \*qHasSecondarySoftButtons\*q
is enabled and this option is set in the __xconfigfile__(__filemansuffix__).
.
+.TP
+.BI "Option \*qHasTrackpointButtons\*q \*q" boolean \*q
+This option is only available on selected devices. You should never need to
+set this option manually, your distribution should ship
+__xconfigfile__(__filemansuffix__) snippets to enable this option where
+required. Devices that require this option include the Lenovo X1 Carbon 3rd
+and the Lenovo *50 series (T450, T550, etc.).
+If enabled, the device is considered to have the trackpoint left, middle,
+right buttons wired to the touchpad. If set, this option disables scroll
+buttons, i.e.
+.B Option \*qUpDownScrolling\*q, \*qLeftRightScrolling\*q
+and the respective repeat options for scroll buttons.
+This options is considered a hardware property and is not exposed as
+configurable X Input device property.
.SH CONFIGURATION DETAILS
.SS Area handling