Redraw icons removes the temperature icons from the system tray and then redraws them. In Windows XP and Vista, sometimes the icons would get out of order so this feature would put them back in the correct order.
Starting with Windows 7, there isn't any way to order the system tray icons that I know of so they appear in a random order. Redraw icons won't accomplish too much in Windows 7 or 8.
RealTemp T|I Editionhttp://www.overclock.net/t/1330144/realtemp-t-i-edition