So, who knew?
If you hold the 'unlock' button down on your car key fob, it will automatically open all your windows. Good to air the car before you get in it on a hot day whilst in sight.
And vice versa......which is actually more useful when you leave your windows open and it starts to piss it down. You don't need to run out and open up the car and insert the key into the ignition to close them!
The car mad people in my life were not even aware of this!