2009 Scion Xd, on the driver's side dash below the mirror controls is a button marked ';SET';. What does it do?

SET should be for those 2 drivers cars with memory seats. YOU sit in the car and adjust the seat and mirror to your liking, then put your spouse or sig/otr and have your adjust it to spec, Push SET and the car remembers your likes, You are 1 and the other is 2, start the car, push # and go away.2009 Scion Xd, on the driver's side dash below the mirror controls is a button marked ';SET';. What does it do?
Check you owners manual