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