Function & Override Buttons: FLR-Def
WARNING: This page is about a different car, the 1999 Lincoln Navigator and 1999 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Pressing floor-defrost icon button will show floor-defrost icon and the selected temperature in the display window. Most air will be directed to floor and defrost vents, with a small amount of air going to side window demisters.