L3 - Format Card (To perform this function before card is being registered)
L4 - Add staff card (To issue new card to staff)
Next, press Enter
L1 - Delete staff card (To delete staff card in case staff resign etc)
L2 - Add Master Card (To create or add new authorizer). Each merchant must have minimum 1 authorizer
L3 - Delete Master Card (To create Master Card in case change of authorizer).
Note: Card can also refers to Key Chain.