2 questions. . .
1) are there any options for this mirror? it seems to take up a lot of real estate in the windshield.
2) i have 3 switches on the bottom of this mirror on the drivers side. what r they for/dod they do? i don't see any result in using them.

 

The buttons are most likely garage door opener buttons.

 

they contain your keyfob antenna.
they might have auto dim option
ans as chrunck said, garage door opener. i have not open one up to see the circuitry for that though.