In the first option, {TAIL ~ 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 a net 
In the first option , { TAIL ~ 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 a net
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH