enable synaptics tapping on Gnome in Archlinux

Before proceeding with tweaking the touchpad, lets search for touchpad packages are available for us in the repository..

wiz@Arch-DOC:~$ sudo pacman -Ss touchpad
extra/xf86-input-synaptics 1.8.1-1 (xorg-drivers xorg) [installed]
    Synaptics driver for notebook touchpads
community/gpointing-device-settings 1.5.1-5
    GUI tool for setting pointing device such as TrackPoint or Touchpad
community/kcm-touchpad 1.1-1
    KCM, daemon and applet for touchpad
community/libsynaptics 0.14.6c-6
    Library for accessing synaptics touchpads


Im on Gnome and my touch pad doesn't seem to do what I intend it to behave,
Now it took quiet a bit of time finding the corresponding packages..
Lets fetch and install the gpointing-device-settings

wiz@Arch-DOC:~$ sudo pacman -S community/gpointing-device-settings
resolving dependencies...
looking for inter-conflicts...

Packages (1): gpointing-device-settings-1.5.1-5

Total Download Size:    0.05 MiB
Total Installed Size:   0.36 MiB

:: Proceed with installation? [Y/n]
:: Retrieving packages ...
 gpointing-device-se...    55.6 KiB  89.2K/s 00:01 [######################] 100%
(1/1) checking keys in keyring                     [######################] 100%
(1/1) checking package integrity                   [######################] 100%
(1/1) loading package files                        [######################] 100%
(1/1) checking for file conflicts                  [######################] 100%
(1/1) checking available disk space                [######################] 100%
(1/1) installing gpointing-device-settings         [######################] 100%
wiz@Arch-DOC:~$

Voila !, the touch pad works seamlessly

HTH