In preferred form, the apparatus includes a body having a groove with {HEAD ~ markings} to define {TAIL ~ the display area} and a display bar that slidably fits within the groove 
to define
In preferred form , the apparatus includes a body having a groove with { HEAD ~ markings } to define { TAIL ~ the display area } and a display bar that slidably fits within the groove
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH