Navigating 3D models in Virtual Reality is a combination of First-Person view and teleportation. Head tracking works with most devices and lets you look around. For setting up the default VR scene scale and view, see VR Editor.
For getting VR mode on your device, see Virtual Reality (VR).
Teleport
Look at / point at the floor grid or any flat surface on the model and press the teleport button to move that position. If there are Annotations, look at / point at the marker and press to move to its defined viewpoint.
HTC Vive: Press the controller trigger
Oculus Rift
Remote: Press the main Select button
Touch Controller: Press the top trigger
Menu
You can open a menu to view help and move between annotations.
HTC Vive: Press the Menu button
Oculus Rift
Remote: Press the Back button
Touch controller: Press A
Or click/tap the X at the top right of the screen.
Scale
On some hardware, you can change the scale of the model.
HTC Vive: Left trackpad button scale down; Right trackpad button to scale up
Oculus Rift
Remote: Left remote button to scale down; Right remote button to scale up
Touch controller: Control stick Left to scale down; Control stick Right to scale up
For small objects (the default scale), you can move around to see it from all sides. If the initial camera view is inside a scene, you can look around and explore the space.