I don't have the owner's manual. So I need your help on working on the AC. There are 10 buttom to funtion the AC:

OFF AUTO ECON
DEF VENT CIRC
OUT. TEMP LO * HI

What is AUTO? ECON? DEF? VENT? CIRC? *?
What setting should be if I just want the air coming from outside?
And what if I want the air generated by the car(not AC, just wind)? Thanks.