Elevator buttons can sometimes be fickle things — confusing labels or tricky security systems can start a trip up or down a building off on a slightly sour note. But on the control panel, there’s one button that stands out for its ability to make someone’s day instead of ruining it: the open door button.
There’s no mystery as to what its job is. If the elevator doors are open, pressing and holding the open door button will usually make sure they stay that way. If the doors have…
