{HEAD ~ These configurations}, when a child frame video is synthesized for its display on the parent frame video in picture in picture, enable {TAIL ~ the child frame video} to be displayed for playback by displaying it in the suitable displayed position 
enable
{ HEAD ~ These configurations } , when a child frame video is synthesized for its display on the parent frame video in picture in picture , enable { TAIL ~ the child frame video } to be displayed for playback by displaying it in the suitable displayed position
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH