Orbit navigation
Move camera: 1 finger drag or Left Mouse Button
Pan: 2-finger drag or Right Mouse Button or SHIFT+ Left Mouse Button
Zoom on object: Double-tap or Double-click on object
Zoom out: Double-tap or Double-click on background
Zoom: Pinch in/out or Mousewheel or CTRL + Left Mouse Button
First-person navigation
Move: ↑,←,↓,→ (or W,A,S,D)
Look around: 1-finger drag or Left Mouse Button
Adjust speed: Mousewheel
Lighting
Rotate lighting: 3-finger drag or ALT + Left Mouse Button
Rotate env. only: ALT + SHIFT + Left Mouse Button