The functionality is shifted so that {HEAD ~ a key} appearing in a certain position relative to {TAIL ~ the display}, from the users perspective, always performs the same function 
The functionality is shifted so that { HEAD ~ a key } appearing in a certain position relative to { TAIL ~ the display } , from the users perspective , always performs the same function
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH