Mind you the stay on top = true wont have much meaning, once you get the DMD onto the correct screen and save position globally.
because there won't be anything for it to go underneath of, but one needs it to atl least find the DMD if it has gone under a table or backglass
Mind you you can do this with no table running
As i mentioned, you can run flexdmdui.exe and use one of the test tabs to get a dmd display to drag around
Or one could also boot up a DMD ROM in vpinmame's setup exe, with use external DLL enabled for that ROM
and drag it around, and then save position globally
If one has values in dmddevice.ini pertaining to location, that are off screen, one could simply edit the defaults back to this
; x-axis of the window position
left = 0
; y-axis of the window position
top = 0
; width of the dmd in monitor pixels
width = 1024
; height of the dmd in monitor pixels
height = 256