To chnage the area of Tap zones have a look at this
taken from synaptics manpage
as you can see we need to change the parameters of LeftEdge RightEdge TopEdge and BottomEdge.
These can be changed with the commands
and you need to change all edges i.e. synclient RightEdge=....
You can guess the numbers or use this command
but first you would need to enable SHMConfig
do this by the following method
Enter this command, it will give you access to change files on nautilus
Enter Password -> go to "File System" -> "USR" -> "share" -> "X11" -> "xorg.conf.d" -> "50-synaptics.conf"
now you should see this
Identifier "touchpad catchall"EndSection
you want to add Option "SHMConfig" "true" so it looks like this
save and exit
now enter "synclient -m 100" in terminal
and you should see this
time x y z f w l r u d m multi gl gm gr gdx gdy
0.000 1 5855 0 0 0 0 0 0 0 0 00000000 0 0 0 0 0
were interested in the x and y numbers
touch your finger on the touchpad were you want the corner of the area 3 you want (see first picture were the TopEdge meets the RightEdge)
you should see the terminal output numbers with a big number around 5000 on x and a number around 2500 in y
the x cordinate is the RightEdge and the y is the TopEdge
record on a piece of paper
then again tap the touchpad at the bottom left at were you want The Leftedge meet the BottomEdge (see again first picture)
the numbers I get are x=2254 y=3654 (each touchpad has different dimensions and you might want a bigger area for the taps)
now here the x=LeftEdge and y=BottomEdge
again record these down
thats all we need so in the terminal you can use this to change the location of the Edges
(these are my own that Ive calibrated with my touchpad and preference so enter the ones you jotted down)
now thats all and you can use this command to see if you changed them
lastly you can add these to xorg.conf.d (see above to recap) and you should have them permantley saved
and the way you type them in as follows
Option "RightEdge" "4905"
dont forget its one space between Option and "RightEdge" and two spaces between "RightEdge" and "4905"
and the same with the other 3 save and reboot and then its complete!