I want to create a transition effect like fade-in/out when each screen is turned (switching).
I’m not sure what to do…
I always thank those who reply 
movieswitchexample.toe (5.2 KB)
take a look at the sceneChanger component. You can wrap your movie file in TOPs into scene components and get cross fading via the scene changer to and from any scene without having to worry about order