# World Flags

Flags are used to block, allow, or customize certain features of a world, such as displaying a message on entry, disabling portals, disabling PvP, and similar functionalities. 

On this page, you can learn more about Flags and how they work.

***

## Setting flags for a world

The main command to set-up flags is:

```
/megaverse flag
```

***

## List of available flags

### pvp

> Allows you to enable or disable PvP (Player vs. Player) damage for this world.
>
> **Default**: `true`
>
> **Bypass permission**: 
>
> ```
> megaverse.bypass.flag.pvp
> ```

### allow-weather-changes

> With this flag, you can disable any weather change for this world.
>
> **Default**: `true`

### keep-spawn-in-memory

> Allows you to set whether the server should keep spawn chunks in memory. It is recommended to leave this option as `false` for better performance.
>
> **Default**: `false`

### portal-formation

> Allows you to block any type of portal formation. For example, with this flag you can prevent players from creating Nether Portals.
>
> **Default**: `true`

### server-join-message

> Allows you to change the server join message in this world.
>
> You can use `%player%` in order to show the joining player's name.

### allow-flying

> With this flag, you can block any players trying to fly.

### force-flying-status

> Allows you to force any player entering the world to start flying instantly.
>
> **Default**: `true`

### allow-hunger

> With this flag, you can disable player hunger in a specific world.
>
> **Default**: `true`

### sound-on-enter

> With this flag, you can play a sound for any player entering a specific world.
>
> **Default**: 
>
> ```parser
> entity.experience_orb.pickup
> ```

### sound-on-leave

> With this flag, you can play a sound for any player leaving a specific world.

### fullheal-on-enter

> With this flag, any player who enters a specific world will automatically be fully healed.
>
> **Default**: `false`

### allow-elytras

> With this flag, you can block and/or allow elytras in a specific world.
>
> **Default**: `true`

### gamemode

> Change the player's gamemode when they enter the world.
>
> You can use 0 for survival, 1 for creative, 2 for adventure, 3 for spectator.

### title-on-enter

> Allows you to display a title on the screen of all players entering the world.
>
> You can show subtitles by including `\n` in the middle of your message. For example: 
>
> ```
> Title\nSubtitle
> ```

### message-on-enter

> Allows you to send a message to all players entering the world.