I go to the secret menu, there I select perpective mode ON. Then go back to the normal nav mode hit the select button and I've got the 3 choices pointing nord, traveling and perpective. I select for example pointing nord and when it appears in 2D I hit the perspective view and it goes to 3D pointing nord. The same with traveling direction 2D I hit the perspective mode and it goes to 3D. When hit the button again change it back to 2D ......... All these things works in split and full screen