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