The Navigation Activity is used to switch from one screen to another.
To add visual effect, if the screen is switched choose between several effects: Slide, None, Fade or Flip.
If you want to enable a Back-Navigation, activate the switch Navigate back. In this case, user will be navigated back according to the last app screen using browser history.
It is also possible to simply drag and drop a screen from the screen view directly into the process designer. A navigation shape will automatically be created.