However, despite such demand there has been no conventional method for giving {HEAD ~ a changeable displayed position} for {TAIL ~ the child frame} in accordance with the change of the parent frame video as described above 
for
However , despite such demand there has been no conventional method for giving { HEAD ~ a changeable displayed position } for { TAIL ~ the child frame } in accordance with the change of the parent frame video as described above
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH