How do you set the mode to "defrost" without actually pressing the front defrost button?

I mean, if it's blow onto the windshield, it's most likely because you want to clear the windshield.

If you didn't want it blowing in your face, you would've chosen face/foot or foot only.

Mods: EV mod, VVT-i emblem, sport pedals, OEM cargo mat, JDM Prius interior footwell lighting, Sylvania Silverstars 9003ST, DICE iPod kit, OEM all-weather mats, TomTom ONE v2, LED licence plate lights.