arm-sdk/extra/chromeveyron/etc/X11/xorg.conf.d/10-synaptics-chromebook.conf

Section "InputClass"
	Identifier        "touchpad"
	MatchIsTouchpad   "on"
	Driver            "synaptics"
	Option            "TapButton1"    "1"
	Option            "TapButton2"    "3"
	Option            "TapButton3"    "2"
	Option            "FingerLow"     "15"
	Option            "FingerHigh"    "20"
	Option            "FingerPress"   "256"
EndSection