What did you select for "Day Map Colors"? Your map is clear and has multiple colors just like Google Maps..Once you're in the nav screen click Enter to display the Menu.
Next click Enter with "Menu" highlighted.
Scroll to "Setup" and click Enter.
Scroll to "Map/View Settings" and click Enter.
With "Map Setup" highlighted click Enter.
Scroll to "Heading Up 3D" and click Enter.
Now click back until you get back to the map view.
I think this will also address your split screen issue, but am not positive.
View attachment 372751