Subaru Legacy 2021 Owner's Manual page 288

282
Climate Control Panel
& 11.6-Inch Display Models
1) Climate control screen
2) Rear window and outside mirror defogger
button (Refer to "Defogger and Deicer"
FP261.)
3) Passenger's side temperature control
button (Refer to "Temperature Control"
FP288.)
4) Driver's side temperature control button
(Refer to "Temperature Control" FP288.)
5) Defroster button (Refer to "Defrosting"
FP291.)