Navigation Modes
There are three different modes of navigation to choose from:
Walk
Navigation in walk mode simulates walking through the model in first person. It includes the option to look around while remaining in a fixed position. Most users find this navigation mode the most intuitive.
Examine
Examine mode simulates holding the model in your hands and gives you the feeling that you are moving the model with your hands.
Fly
Navigation in fly mode simulates a mode of navigation similar to flying a helicopter.