The meme shows a close-up photo of an elevator control panel with floor buttons arranged vertically. The visible labels read 4, 3, and 2, but the bottom button’s label appears worn away, smudged, or erased, leaving a dark blank square where the number would normally be.
Above the photo, the caption says, “Someone rubbed one off in the elevator,” setting up the viewer to notice the missing label and infer that the “1” button has been rubbed so much that it disappeared.