F12::
 toggle  := !toggle
 if (toggle = 1){
 TrayTip Layer 1, KEYBOARD LAYER # 1
 sleep 1000
 HideTrayTip()
 } else {
 TrayTip Layer 0, KEYBOARD LAYER # 0
 sleep 1000
 HideTrayTip()
 }
 return

HideTrayTip() {
 TrayTip  ; Attempt to hide it the normal way.
 if SubStr(A_OSVersion,1,3) = "10." {
 Menu Tray, NoIcon
 Sleep 200  ; It may be necessary to adjust this sleep.
 Menu Tray, Icon
 }
 }

;layer 0 = default, layer 1 should have custom functionality when needed
#If (toggle = 1)
;specific functionality here

#If