To automatically perform a scaling operation after making an automated layout:
The Off choice turns off automatic scaling. The Scale to Fit choice resizes all the nodes to fit in the boundaries of the window. The Scale Selection choice resizes only the selected nodes to fit in the boundaries. The Scale by Factor choice resizes nodes according to the Scale Factor slider. The Normal Size choice sets nodes to their normal size, 64 pixels square, even if you may need to scroll to see certain nodes.