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. Each additional piece of glowstone after the first increases the light level by four, up to a maximum of 15. The charge is indicated by a dial on the side of the block. Up to four glowstone blocks can be used to charge the anchor. When a glowstone block (not glowstone dust) is used with it, a charge is added, the texture of the block changes, and it starts emitting a light level of 3. When crafted, a respawn anchor has no (zero) charge and can't yet be used until charged. Once the block is charged, it can be used to set the player's respawn location. The respawn anchor is used to respawn in the Nether, even if the player leaves the Nether. column1-layer2 has priority over column2-layer1, and column8-layer1 has priority over column1-layer3. Respawn attempts are made per column for layer1 and layer2, layer3 is used when attempts for all columns fail for layer1 and layer2 e.g. The minimum area required to be valid is 1×2×1.
Tile priority in where the anchor looks to respawn the player (with 1 being the highest).
