To use zoom, follow the below steps:
1. Simply pinch the screen out or double tap the viewing pane when live streaming or watching a recording. You can do this while in portrait or landscape mode.
2. Pinch the screen in or double tap the viewing pane again to go back to your normal viewing range.
When you move to another screen or leave the app, the camera will return to it's normal viewing range. Recordings will always be captured in the normal viewing range, even if you are currently zoomed in on the viewing pane while recording.