How do I use the Wrinkle Prevent option and what does it do?

Select Wrinkle Prevent before touching START if you will be unable to remove the load promptly after the cycle ends. This adds up to 120 minutes of periodic tumbling to help reduce wrinkling. On some cycles, you can also select the 'With Steam' setting to add a short steam cycle after 60 minutes to further smooth out wrinkles. (Page 7)