The main Map screen has a few important areas and buttons:
in the top left corner opens the main Menu where you can change the navigation target, Navboxes, Logbook and App settings.
in the top right corner controls what is displayed on the map. You can choose different map types and additional layers which are displayed on top of the map.
are small information panels with data. They can be moved around the screen freely. And they can be styled with color and transparency.