I was in an elevator, waiting for it to close. Someone came toward the elevator just as it was closing. I tried searching for the button to keep the doors open, but there were a lot of buttons, and I was unfamiliar with the layout. It closed before they could get there. I gave an apologetic look just as the doors were closing, somehow conveying with that look that I was unfamiliar with the layout of the buttons. After the door closed, though, I found the buttons, and noticed that they were shaded green so that they would stand out and could be easily found.