Does this help? Press the button and choose the lock icon.
Locking and Unlocking the Touchscreen You can lock the touchscreen to prevent inadvertent screen touches. 1 Hold the key. 2 Select . The touchscreen locks and does not respond to touches until you unlock it. 3 Hold the key to unlock the touchscreen. Using the Controls Menu The controls menu contains customizable shortcuts, such as turning on do not disturb mode, locking the touchscreen, and turning the device off. NOTE: You can add, reorder, and remove the shortcuts in the controls menu (Customizing the Controls Menu, page 14). 1 From any screen, hold the key. 2 Select an option.
