Minecraft wiki entry for Respawn_Anchor, associated text: To set the player's spawn location to the respawn anchor they must right click on it, just like one does with a bed, and the Anchor must at least have one charge at the time of the click. A confirmation appears when the player's respawn location is set. Other players can also set their respawning to the same respawn anchor. Each respawning uses up one charge, even if used by another player.