The software program also includes {HEAD ~ a method} which proportionately reduces {TAIL ~ the font size} of the displayed characters 
proportionately reduces
The software program also includes { HEAD ~ a method } which proportionately reduces { TAIL ~ the font size } of the displayed characters
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH