Box2D bodies are independent objects from Phaser game objects, you can add them to a scene or associate them with a game object.
To add a Box2D body to a scene, you have two options:
- Drag the b2Body block from the Blocks view and drop it into the scene:
- Open the scene context menu (right-click), and select the Box2D Physics → Add Body To Scene option:
To add a body to a Phaser game object, you must first select the object in the scene, and then activate the Box2D Physics → Add Body To Sprite option from the context menu: 
Once the body is in the scene, you can edit its properties in the Inspector view:
Box2D body transform properties
Since a Box2D body is independent of Phaser game objects, they have position and rotation. However, if the body is attached to a game object, the position of the body is synchronized with the position of the game object, so those fields are disabled.
The Translate and Rotate manipulation tools are also available for Box2D bodies, which is an effective way to adjust the position and rotation of bodies. As mentioned, Translate can only be used on bodies that are not associated with a game object.
The following image shows a static body that is not associated with a game object. Visually it corresponds to two stone blocks forming a platform, but in the scene the body is independent of these blocks:
Box2D body as a variable
For Phaser Editor, a Box2D body is not a game object, but it is an object in the scene that shares many characteristics with game objects:
- They are an independent object.
- You can assign a scope and a name to it, so the editor generates code to access them, such as fields and temporary variables.
- Although you cannot create a prefab of a Box2D body, you can declare them as a nested prefab.
- The Variable section is shared by both game objects and Box2D bodies.
Box2D body as nested prefab
The usual way to configure a Box2D body is through the configuration object that we pass in its constructor. For this reason, the nested prefabs of bodies need a special way to modify their properties. We call this special way xargs. You can learn more about xargs in the section The nested prefab constructor and the xargs.