Você pode editar o arquivo /etc/X11/xorg.conf.d/50-synaptics.conf da seguinte maneira. Moreoevr, usei o xSwipe para adicionar algumas funcionalidades "swipe".
# Example xorg.conf.d snippet that assigns the touchpad driver
# to all touchpads. See xorg.conf.d(5) for more information on
# InputClass.
# DO NOT EDIT THIS FILE, your distribution will likely overwrite
# it when updating. Copy (and rename) this file into
# /etc/X11/xorg.conf.d first.
# Additional options may be added in the form of
# Option "OptionName" "value"
#
Section "InputClass"
Identifier "evdev touchpad catchall"
Driver "synaptics"
MatchIsTouchpad "on"
MatchDevicePath "/dev/input/event*"
# disable synaptics driver pointer acceleration
Option "Protocol" "event"
Option "SHMConfig" "on"
Option "MinSpeed" "1"
Option "MaxSpeed" "1"
# tweak the X-server pointer acceleration
Option "AccelerationProfile" "2"
Option "AdaptiveDeceleration" "16"
Option "ConstantDeceleration" "16"
Option "VelocityScale" "32"
Option "TapButton1" "1" # left click with one finger tap
Option "TapButton2" "3" # right click with two finger tap
# This option is recommend on all Linux systems using evdev, but cannot be
# enabled by default. See the following link for details:
# http://who-t.blogspot.com/2010/11/how-to-ignore-configuration-errors.html
MatchDevicePath "/dev/input/event*"
#EndSection
#
#Section "InputClass"
# Identifier "touchpad ignore duplicates"
# MatchIsTouchpad "on"
# MatchOS "Linux"
# MatchDevicePath "/dev/input/mouse*"
# Option "Ignore" "on"
EndSection
# This option enables the bottom right corner to be a right button on
# non-synaptics clickpads.
# This option is only interpreted by clickpads.
#Section "InputClass"
# Identifier "Default clickpad buttons"
# MatchDriver "synaptics"
# Option "SoftButtonAreas" "60% 0 0 5% 40% 60% 0 5%"
# To disable the bottom edge area so the buttons only work as buttons,
# not for movement, set the AreaBottomEdge
# Option "AreaTopEdge" "4%"
#EndSection
# This option disables software buttons on Apple touchpads.
# This option is only interpreted by clickpads.
Section "InputClass"
Identifier "Disable clickpad buttons on Apple touchpads"
MatchProduct "Apple|bcm5974"
MatchDriver "synaptics"
Option "SoftButtonAreas" "0 0 0 0 0 0 0 0"
EndSection