The Draw Layer: A Metaphysical Space (And How to Bring It Back Down to Earth)
http://word.mvps.org/FAQs/DrwGrphcs/DrawLayer.htm

Rado, Dave and Bill Coan
Word MVP Site, The
2005

Abstract:

Word's draw layer is a metaphysical space where floating objects reside. It really isn't a layer, since floating objects can be sent behind the text layer or brought out in front of it. Either way, they continue to reside in the draw layer.