Adding a camera requires you to attach it to an anchor point to determine their location. This is usually done with a reference frame.
1.Select Program ➔ Add Reference Frame to create a new coordinate system. More information in the Getting started section.
2.Place the frame at the desired camera location, where XYZ coordinates are the camera location, the Z+ axis represents the aim direction, and the Y+ axis represents the down direction.
3.Select Connect➔Simulate 2D camera and select the reference frame.
You now have a default camera attached to the anchor point.