{HEAD ~ This locus} may be, in various embodiments herein, a single pixel, {TAIL ~ a row} of pixels, or a number of rows of pixels of frame buffer memory 
be
{ HEAD ~ This locus } may be , in various embodiments herein , a single pixel , { TAIL ~ a row } of pixels , or a number of rows of pixels of frame buffer memory
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH