Go to Home
Click the 3D View | Home | Go to Home command or the 
button to reset the camera position, rotation, and zoom to the last saved home position.
The home position is set with the 3D View | Home | Set Home command. After setting the view to the desired rotation, zoom, and position, click the 3D View | Home | Set Home command to save this position.
The home position is only saved while the plot window is open. The 3D view can be opened and closed, and the home position will be remembered. However, the home position is forgotten when the plot window is closed.