add content node

docs/faqs/03-setup-cocos-scene.md

@@ -22,3 +22,27 @@ Use this configuration to control which prefabs appear based on the current plat
 |--------------------|----------------------|-----------------------------------------------|
 | **Desktop Toggle** |  ✅ Enabled          | Show node on desktop                          |
 | **Mobile Toggle**  |  ❌ Disabled         | Hide node on mobile                           |
+
+
+## Node Spawner
+
+Spawns a prefab at the same position as the original node and then removes the node.
+
+#### Usage
+
+- On scene start, the prefab replaces the node.
+1. Attach the script to a placeholder node.
+2. Set the `prefab` property in the Inspector.
+
+
+## UI Mobile Landscape / Portrait  Position
+
+Positions a node at a specific location when the device is in landscape / portrait mode on mobile.
+
+#### Usage
+
+1. Attach the script to your node.
+2. Set `default Position` in the Inspector.
+3. The position updates automatically in mobile landscape / portrait mode.
+
+![Position](./img/default-setting.png)