Please see the manual section of the support website for details on your specific LCD screen.
For most of the LCD displays, press and hold the "UP" and "DOWN" buttons on the display or key-pad simultaneously. You will now enter the basic settings.
Pressing the "UP" and "DOWN" buttons will change the flashing value.
Pressing the middle button will advance to the next setting.
Press and hold the middle button to save the settings and exit.
Please take note of any settings before changing them.