When the knob is pressed in a direction indicated by {TAIL ~ an arrow Pf}, {HEAD ~ the press switch} 8 makes a stroke 
When the knob is pressed in a direction indicated by { TAIL ~ an arrow Pf } , { HEAD ~ the press switch } 8 makes a stroke
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH