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