In one example, a zoom in command is generated and transmitted when {HEAD ~ the camera based device} 115 is moved along the axis, towards {TAIL ~ the display device} 105 
is moved towards
In one example , a zoom in command is generated and transmitted when { HEAD ~ the camera based device } 115 is moved along the axis , towards { TAIL ~ the display device } 105
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH