In a 3D camera view, the viewing field refers to your field of vision. It works like a camera lens: higher values produce a wide-angle view; lower values produce a close-up view.
Sometimes changing the viewing field angle makes it seem like you are zooming in or out. This is because for wide-angle views, the program needs to shrink the image to provide enough screen space to contain the view. Conversely, the program enlarges the image to fill the screen at smaller view angles, creating a close-up view.
To change the viewing field angle in a 3D camera view:
With the 3D camera view displayed, right-click in the drawing window and select Camera Properties.
In the Camera Properties dialog, type the desired angle in the View Angle edit box, or use the slider to increase or decrease the angle.
Click Apply to see the change.
If the view is acceptable, click OK.
Interior with 45º View Angle
Interior with 120º View Angle