how do you decorate a fullscreen root window?

[Lewis_W_Brown@blm.gov]

Not so long ago, on another Windows machine, X opened it's fullscreen root
window within a Windows window, allowing me to resize or drag it to
partially display both the X root and Windows desktop.  This was
convenient.

Currently, I am unable to duplicate this behavior:  -fullscreen opens
without decoration, requiring ALT-TAB to reveal any other windows;
-fullscreen -scrollbars (a guess) fails.

Is this behavior no longer supported?  What configuration parameters am I
missing?

Thanks for the help and the good work.

lb