Section "InputDevice"
  Identifier  "Expert Mouse"
  Driver      "mouse"
  Option      "SendCoreEvents"        "true"
  Option      "Device"                "/dev/input/mice"
  # /dev/input/mice can emulate plain PS2, ImPS/2 and ExplorerPS/2;
  # # only this one supports more than 3 buttons + scrollwheel:
  Option      "Protocol"              "ExplorerPS/2"
  # # scroll wheel
  Option      "ZAxisMapping"          "4 5"
  # # four real buttons and the scroll wheel:
  Option      "Buttons"               "6"
  # # This bit's optional; it configures button 4 as a sort of 'lock'
  # # button, so instead of holding down one of the other buttons you
  # # first press button four then click the other button:
  Option      "DragLockButtons"       "8"
  Option      "ButtonMapping"         "8 3 1 2"
EndSection