10-synaptics.conf

Section "InputClass"
        Identifier                      "Trackpad"
        MatchIsTouchpad                 "on"
        Driver                          "synaptics"

        Option  "TapButton1"            "1"
        Option  "TapButton2"            "2"
        Option  "TapButton3"            "3"

        #Uncomment the followings to scroll with your thumb
        #Option  "EmulateTwoFingerMinZ"  "70"
        #Option  "EmulateTwoFingerMinW"  "0"

        Option  "VertTwoFingerScroll"   "1"
        Option  "HorizTwoFingerScroll"  "0"

        #Let finger rest
        Option "AreaBottomEdge"         "4000"
EndSection