Instructions

The display will now show four consecuting points
that you will have to press. Aer that, four calibration
values will be outputted to you, which you must enter
in the previously created file „99-calibration.conf“.
For this, please enter the following command (in one
line):
Enter the following content here and amend the four
values of the "calibration" option with those, which
have been outputted to you in the previous step:
Finally, you have to restart the Raspberry Pi for the last
time:
Now the Touch function is ready to use.
sudo nano /usr/share/X11/xorg.conf.d/99-calibration.conf
sudo reboot
Section "InputClass"
Identifier "calibration"
MatchProduct "eGalax Inc. USB TouchController"
Option "Calibration" "4094 -35 4026 10"
Option "SwapAxes" "1"
EndSection