How do I use the Wrinkle Shield feature?

The Wrinkle Shield feature provides 40 minutes of heat-free, periodic tumbling at the end of a drying cycle to help prevent wrinkles from forming when you cannot remove clothes immediately. You can turn the Wrinkle Shield knob to on or off at any time before the cycle has ended. When the Wrinkle Shield setting is active, the cycle signal tone will sound every 5 minutes until the clothes are removed or the Wrinkle Shield setting ends. (Page 6)