In one aspect, the viewer may watch {HEAD ~ a program} on {TAIL ~ the currently tuned channel}, while browsing through the other channels on a portion of the television screen 
In one aspect , the viewer may watch { HEAD ~ a program } on { TAIL ~ the currently tuned channel } , while browsing through the other channels on a portion of the television screen
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH