I think it would be very helpful to have an interface for positioning the perspective camera much like the one the FormZ Edit Cone of Vision command. It would be great to simultaneously see top, front, plan and perspective views and have a moveable icon that represents the camera position in the top, front and plan views. Moving the camera in any of these views would dynamically change the perspective view. It would be great if the cone of vision (view frustrum) angles and possibly front and back clipping planes could be continuously adjusted (vs. just narrow-normal-wide settings) also. Thanks.