Flip the tab to switch the position.
The night position will help to reduce the glare from headlights behind you when driving after dark.
Keep the inside and outside mirrors clean and adjusted for best visibility.
Adjust the mirrors before you start driving.
Front Seats
Honda Civic Owners Manual. Anti-lock Brake System (ABS)
ABS
Helps prevent the wheels from locking up, and helps you retain steering
control by
pumping the brakes rapidly, much faster than you.
The electronic brake distribution (EBD) system, which is part of the ABS, also
balances the front-to-rear braking distribution according to vehicle loading ...