Logitech Marble Mouse Configuration (append section to file)

10-evdev.conf

#/etc/X11/xorg.conf.d/10-evdev.conf

Section "InputClass"
        Identifier  "Marble Mouse"
        MatchProduct "Logitech USB Trackball"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
#       Physical button #s:     A b D - - - - B C    b = A & D simultaneously;   - = no button
#       Option "ButtonMapping" "1 8 3 4 5 6 7 2 2"
        Option "ButtonMapping" "1 2 3 4 5 6 7 2 8"   #  From my configuration
#       Option "ButtonMapping" "1 8 3 4 5 6 7 2 2"   #  For right-hand placement
#       Option "ButtonMapping" "3 8 1 4 5 6 7 2 2"   #  For left-hand placement
#
#       EmulateWheel refers to emulating a mouse wheel using Marble Mouse trackball.
        Option "GrabDevice" "true"
        Option "EmulateWheel" "true"
        Option "EmulateWheelButton" "8"              # Factory default; use "9" for left-side placement.
        Option "EmulateWheelInertia" "30"            # Factory default: 50
        Option "EmulateWheelTimeout" "1"
#       Option "EmulateWheelButton" "9"
        Option "ZAxisMapping" "4 5"
#       Option "XAxisMapping" "6 7"                  # Disable this for vertical-only scrolling.
#       Emulate3Buttons refers to the act of pressing buttons A and D
#       simultaneously to emulate a middle-click or wheel click.
        Option "Emulate3Buttons" "true"
#       Option "Emulate3Buttons" "true"              # Factory default.
EndSection