I Am writing a Guide How to install Ubuntu on Lenovo Yoga 2 Pro

To get a middle Mousebutton, I tried this:

I edited the file /usr/share/X11/xorg.conf.d/50-synaptics.conf.
There I edited the "touchpad catchall" section, so it will look like this:

Section "InputClass"

    Identifier "touchpad catchall"

    Driver "synaptics"

    MatchIsTouchpad "on"

    # 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*"



    Option "FingerLow"              "46"

    Option "FingerHigh"             "46"

    Option "ClickFinger1"           "1"

    Option "ClickFinger2"           "2"

    Option "ClickFinger3"           "3"

    Option "TapButton1"             "1"

    Option "TapButton2"             "2"

    Option "TapButton3"             "3"

    Option "AreaBottomEdge"         "85%"

    Option "SoftButtonAreas"        "60% 0 85% 0 40% 60% 85% 0" # Btn2 LRTB - Btn3 LRTB

    Option "EmulateMidButtonTime"   "75"

EndSection

(source: http://memobadz.wordpress.com/2014/02/16/lenovo-yoga-pro-2-on-ubuntu/ )

But this didn't enable a simulated Middle click as mentioned in memobadz' wordpress Blog (although it still helped a lot in other aspects).

How do I simulate a Middle mouse-button by tapping three Fingers?

I couldn't manage it with that help so far.