Pardon me if it's something obvious, but what exactly is the "Navigation Style" option? What does it change? I tried changing it but I remain confused.
What about the "movement indicators"?
The movement indicators are visible arrow at the side of the screen when you move the mouse left/right/up. They show that clicking there will either look or move.
The navigation style is based on this.
Swipe & push - You can drag the screen left/right to look and drag down to move forward, or click on the side of the screen where the indicators were shown.
All other options are variants of these. ie: Swipe only, push only, press to look and swipe to move.