The design option routine can be further expanded by having {HEAD ~ the operator} select {TAIL ~ more menu selections} 
The design option routine can be further expanded by having { HEAD ~ the operator } select { TAIL ~ more menu selections }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL