The Windows->Cascade menu item restores the cascaded file window style. Any user rearrangement or size changes are retained.
The default cascaded window arrangement is one where the active window partially obscures the recessive window as shown. Activating the recessive file window brings it to the foreground. To reset the windows to default size and position, push the Size pushbutton in the Data Panel.
This arrangement is good for all window views. It is not good for visual comparison of the content of the two Files windows.
Accelerator Keys - Alt 3
Example of Cascaded File Windows
In the above example, the active Files window is in Details view.