You can find photos of elevator control panels where the "close door" button is ...

		yencabulator on Aug 4, 2020 \| parent \| context \| favorite \| on: System UIcons – icons designed for products, no at... You can find photos of elevator control panels where the "close door" button is falling off, and is revealed to be just glued on with no electronics behind it. So commonly the button has a special-operating-mode purpose, but not always.