Minecraft wiki entry for Map, associated text: When the player leaves the area shown on a specific map, the player pointer transforms into a white dot on that map. The marker shrinks to a smaller white dot if the player is far from the map's center: the radius is 320 blocks per scale factor. The dot moves along the edge of the map to show the relative location of the player. However in Bedrock Edition, the pointer remains as an arrow but shrinks until the player is near the area shown on the map.