commit 55709758e2034df213c601f9ee44c56bd5d09c8a
Author: Tom Hughes <tom@compton.nu>
Date:   Wed Dec 17 08:34:44 2014 +0000

    Make the central portion of the bottom clickpad act as middle mouse

diff --git a/src/evdev-mt-touchpad-buttons.c b/src/evdev-mt-touchpad-buttons.c
index f48d2ed..40c77c1 100644
--- a/src/evdev-mt-touchpad-buttons.c
+++ b/src/evdev-mt-touchpad-buttons.c
@@ -540,8 +540,8 @@ tp_init_softbuttons(struct tp_dispatch *tp,
 		tp->buttons.bottom_area.top_edge = height * .85 + yoffset;
 	}
 
-	tp->buttons.bottom_area.rightbutton_left_edge = width/2 + xoffset;
-	tp->buttons.bottom_area.leftbutton_right_edge = width/2 + xoffset;
+	tp->buttons.bottom_area.rightbutton_left_edge = width * .58 + xoffset;
+	tp->buttons.bottom_area.leftbutton_right_edge = width * .42 + xoffset;
 
 	if (tp->buttons.has_topbuttons) {
 		/* T440s has the top button line 5mm from the top, event