How do I activate and deactivate the Control Lock feature?

Press and hold the Control Lock button for 5 seconds to activate or deactivate the controls. When Control Lock is active, the Control Lock indicator will illuminate and 'CL' will be displayed alternately with the estimated time remaining, and all buttons except the ON/OFF button are disabled. This feature prevents children from changing cycles or operating the dryer while it is in use. (Page 25)