Moves the view forward or backward.
In general, it is more convenient to use the Autodesk® ViewCube® or View Panel (
+ 
(Windows); + 
or + 
(Mac)). However this tool lets you set certain options more precisely.
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
.
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.
For orthographic window, two of the three Eye and View values must be the same, and two of the three Eye and Up values must be the same. If they are all different or all the same, the results are unpredictable. This is because viewing operations on orthographic windows are done on the window rather than the camera of the window.
If this option is checked (default), holding down a mouse button without dragging in an orthographic window dollies smoothly in (left mouse button), or out (middle or right mouse buttons).
If this option is unchecked, or if you drag the mouse immediately, a dolly box is drawn and the view dollies in (if you drag right) or out (if you drag left) in discreet increments.
