Minecraft wiki entry for Heads-up_display, associated text: The HUD consists of the user's health, hunger and experience bars, the hotbar, as well as a crosshair that designates the currently focused on block or entity if the player is not playing on a mobile device and has not enabled split controls. The armor condition bar appears above the health bar if the player is wearing armor, and the oxygen bar displays above the hunger bar if the player's air supply NBT tag is below 300. Note that the health and armor bars are on the top left and the hunger and oxygen bars are on the top right if the player is in Bedrock Edition and has chosen the Pocket Edition UI.