If the pixel shader debugger link is selected by the user, then a pixel shader debugger window is opened to display information regarding {HEAD ~ the pixel shader} used for {TAIL ~ the selected pixel} 
used for
If the pixel shader debugger link is selected by the user , then a pixel shader debugger window is opened to display information regarding { HEAD ~ the pixel shader } used for { TAIL ~ the selected pixel }
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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL