In the first option, a user may navigate through the layout data to identify {HEAD ~ a particular X and Y location} to make a cut, create a probe point, or to connect {TAIL ~ a net} 
In the first option , a user may navigate through the layout data to identify { HEAD ~ a particular X and Y location } to make a cut , create a probe point , or to connect { TAIL ~ a net }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL