To create a new scene go: Insert > Scene or click the Create New Scene icon in the Scene panel.
To display the scene panel: Window > Scene.
To delete a scene: click the delete scene button (trash can) in the scene panel.
To change the scene order: Drag the scene name to a different location in the scene panel.
Locate the Scene drop down in the Left Corner of the Stage.
Click on the dropdown arrow and select your scene
Open up the Scene Panel. If you don't see it go Windows > Scene.
From here, click and drag your scenes in order.
You can also DELETE a Scene or Create a New Scene