Minecraft wiki entry for Map, associated text: In Java Edition the player has the ability to mark spots on a map. To do this, use a map on a placed-down banner, and the spot of the banner gets marked on the map. The mark takes the color of whatever the base color is for the banner, and if the banner has a name, the mark shows that name. Banner marks on a map are always oriented with their top facing north, regardless of the banner's actual orientation. If the banner is destroyed, the mark of the banner remains at first, but if the player gets closer to where the banner previously was, it disappears as the area is updated on the map.