Automatically centers the view on the picked objects, including construction planes.
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 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).