Screens or Components

Hi, how can i do when i press the button the app creates a new screen or component?

You cannot create a new screen, but you can create a virtual screen (you can create a new VerticalArrangement and do whatever it is you want to do in it).

A bit more regarding screens, Screens are Android activities, and all activities must be declared in the Android manifest at compile time (so they must be known to App Inventor). The companion app simulates multiple screens by using a single screen and clearing it when you switch screens. This is not ideal of course because component state is lost in this process but it's only provided as a simulation of how the final app might behave.