The Stage system can be used in a wide variety of ways. The different stages could represent variants of a design you would like to share, or even 3D frames of a storyboard illustrating an interaction, a customer journey, or a user flow.
Open the stage menu by shifting up the stick on your non-dominant hand.
To create a new empty stage, click on "+" on the outmost right.
Move the stick left or right to switch between main stages (even without opened menu).
To move objects between stages simply grab any model and switch the stage by other hand via stick. In the same way it works with background stage.
From now on you will have access to a background stage. Adding objects or making any changes to this special stage will propagate across all other stages.
Open the stage menu by shifting up the stick on your non-dominant hand and then shift it down to go to the background stage. You can open this stage from any other stage, no matter what number it is.