What is the Child Lock function and how do I activate it?

The Child Lock function prevents the dispenser buttons, display, and Flex Zone panel from being used. When activated, the refrigerator will not dispense ice, water, or sparkling water even if the dispenser lever is pressed. To activate Child Lock, press and hold the Ice Off button for 3 seconds until the Child Lock icon lights up. To deactivate it, press and hold the Ice Off button again for 3 seconds. (Page 20, 25)