Samsung RFG299AARS-XAA - Manual (Page 23)

How to calibrate the touch point.
this function can be used to calibrate the stylus pen touch point to improve usability with the touch screen.
1. Choose the [Touch Screen Correction] button, and
then a screen will appear with pointer instructions
on the top.
2. Press down lightly on the center of the “+” mark.
Repeat as the “+” mark moves on the screen.
During the calibration, when you do not pinpoint the “+” mark, it will keep showing up on the screen.
▶ To keep the current setting, wait for 30 seconds.
3. To save the new calibration data, touch the LCD screen within 30 seconds.
How to change the Current Data/Time.
1. Choose the [Current Data/Time] button. 2. Choose the desired date and time.
3. To apply your new settings, press [OK] button.