Automatically centers the view on the picked objects, including construction planes. To center the view window on an object or group of objects, Pick the objects, and then select the tool or or press Alt + L.
When a construction plane is selected in the Perspective window, the Look at tool orients the view flush to the plane (that is, the view vector becomes perpendicular to the plane).
Look At Options
Access this tool from the View palette:

If Fit to View is turned on, using Look at also dollies in on the object as it is centered in the window. By default, Fit to View is on.
If you use Look at when nothing is picked, the camera includes all objects in the view. If Exclude Lights is turned on, lights are excluded.
If you use Look at when nothing is picked, the camera includes all objects in the view. If Exclude Textures is turned on, texture placement objects are excluded.
If this option is turned on (default), Look at takes into account the symmetric instances of objects (on layers with symmetry planes) when determining a new camera position.
If this option is turned on, Look at re-orients the view to place the ground plane at the bottom of the screen. This option is off by default.
When a construction plane is selected in the Perspective window, the Look at tool orients the view flush to the plane (that is, the view vector becomes perpendicular to the plane).
Look At workflow
To center the view window on the entire scene:
choose Pick Nothing ![]()
Choose Look At
, or press Alt + L.