functions are mapped onto keys on the numeric keypad.
Because the number of keys on the numeric keypad is limited, the functions are assigned in layers. Any
key can have multiple functions, depending on which layer is active.  You can use the assigned layers of the  numeric keypad to work with the different functional areas of the
application. The numeric keypad codes are written as follows: LayernnKeynnExplanation:LayernnRepresents the number of the keypad layer.KeynnRepresents the key value.
