Use the RollView command to view your model interactively in 3D with the camera moving and the model stationary.
To view the model in 3D using Constrained Orbit:
.A green pivot pointÂ
appears in the center of the model. If you selected entities before you entered Constrained Orbit mode, the pivot point appears at the center of the selected entities.
Access
Command: RollView
Menu: View > 3D Orbit > Constrained Orbit
Ribbon: View > Render > Constrained Orbit