Disabling automatic NetworkObject checks

docs/basics/networkbehaviour.md

@@ -5,14 +5,18 @@ title: NetworkBehaviour spawning and despawning
 
 [`NetworkBehaviour`](https://docs.unity3d.com/Packages/com.unity.netcode.gameobjects@latest?subfolder=/api/Unity.Netcode.NetworkBehaviour.html) is an abstract class that derives from [`MonoBehaviour`](https://docs.unity3d.com/ScriptReference/MonoBehaviour.html) and is primarily used to create unique netcode or game logic. To replicate any netcode-aware properties or send and receive RPCs, a [GameObject](https://docs.unity3d.com/Manual/GameObjects.html) must have a [NetworkObject](networkobject.md) component and at least one `NetworkBehaviour` component.
 
-A `NetworkBehaviour` requires a NetworkObject component on the same relative GameObject or on a parent of the GameObject with the `NetworkBehaviour` component assigned to it. If you add a `NetworkBehaviour` to a GameObject that doesn't have a NetworkObject (or any parent), then Netcode for GameObjects automatically adds a NetworkObject component to the `GameObject` in which the `NetworkBehaviour` was added.
-
-`NetworkBehaviour`s can use `NetworkVariable`s and RPCs to synchronize states and send messages over the network. When you call an RPC function, the function isn't called locally. Instead, a message is sent containing your parameters, the `networkId` of the NetworkObject associated with the same GameObject (or child) that the `NetworkBehaviour` is assigned to, and the index of the NetworkObject-relative `NetworkBehaviour` (NetworkObjects can have several `NetworkBehaviours`, the index communicates which one).
+`NetworkBehaviour`s can use `NetworkVariable`s and RPCs to synchronize states and send messages over the network. When you call an RPC function in a `NetworkBehaviour`, the function isn't called locally. Instead, a message is sent containing your parameters, the `networkId` of the NetworkObject associated with the same GameObject (or child) that the `NetworkBehaviour` is assigned to, and the index of the NetworkObject-relative `NetworkBehaviour` (NetworkObjects can have several `NetworkBehaviours`, the index communicates which one).
 
 For more information about serializing and synchronizing `NetworkBehaviour`s, refer to the [NetworkBehaviour synchronization page](networkbehaviour-synchronize.md).
 
-:::note
+## `NetworkBehaviour` requirements
+
+A `NetworkBehaviour` requires a NetworkObject component on the same relative GameObject or on a parent of the GameObject with the `NetworkBehaviour` component assigned to it. If you add a `NetworkBehaviour` to a GameObject that doesn't have a NetworkObject (or any parent), then Netcode for GameObjects automatically adds a NetworkObject component to the `GameObject` in which the `NetworkBehaviour` was added.
+
 It's important that the `NetworkBehaviour`s on each NetworkObject remain the same for the server and any client connected. When using multiple projects, this becomes especially important so the server doesn't try to call a client RPC on a `NetworkBehaviour` that might not exist on a specific client type (or set a `NetworkVariable` that doesn't exist, and so on).
+
+:::warning Disabling automatic NetworkObject addition
+You can optionally disable the automatic addition of NetworkObjects to GameObjects in the Editor using the **Multiplayer** > **Netcode for GameObjects** project settings. However, this is only recommended for advanced users who understand the implications and have alternative strategies in place to ensure that GameObjects with `NetworkBehaviour`s always have an associated NetworkObject.
 :::
 
 ## Spawning