For elevators at least, there’s a much better explanation for the “door close” button: it’s intended to be used when the elevator is in a mode which holds the d

For elevators at least, there’s a much better explanation for the “door close” button: it’s intended to be used when the elevator is in a mode which holds the door open by default, like when someone’s moving into an apartment building. In this case, you have to hold that button down until the door closes all the way.