Samsung NP540U3C User Manual page 45

Using a Touch Screen
Calibrating the Screen
If you are using the touch screen for the first time or the pointer is
not aiming correctly and the accuracy has declined, calibrate your
screen.
The screen calibration process may differ depending on the OS. It
may not be supported by some operating systems.
1
On the Desktop, press the Charms menu > Settings >
Control Panel > Tablet PC Settings > Calibration. Then
press OK.
(Touch screen models only)
2
When the Calibration window appears, press the + mark by
following the onscreen instructions.
3
The input location of your touch screen is calibrated.
Chapter 2
44
Using Windows 8