Panels can be detached just by dragging them out, to the center of the viewport.
You can dock and re-arrange the panels any way you want.
Changing the layout is very useful when you want to find a good way to work with RENDERLights.
Panels can be drag out of the working area in case you use two monitors.
Layout is saved when you close the program, you can revert to default on settings/layout /default.