Azimuth/Elevation
Revolves the camera about the center of interest in the perspective view.
Azimuth/Elevation can be used only in a Perspective window.
Azimuth/Elevation Options
Eye/View/Up
These sliders let you define a view by moving the camera.
The Eye position, View point position, and Up vector end point determine the view. The nine fields that define these positions contain decimal numbers. They represent, from left to right, the X, Y, and Z Coordinates for each of the three camera parameters.
To see the camera as you modify it, use WindowDisplay > Toggles > Cameras 
.
Zoom
The Zoom slider takes a decimal number that defines the extent of the field of view of the camera. Values must be positive in the range of 0.2 to 179 degrees.
Azimuth/Elevation workflow
To revolve the camera around the center of interest:
- Place the cursor in the perspective window and click a mouse button to make the window active.
- Select the tool. As the cursor moves, the view rotates about the center of interest (initially the origin).