Open the multi puncher front door.
Turn Knob GP4 clockwise to set the die set blade position indicator to the horizontal position as shown in the illustration.
Horizontally dispose the die set punch blade position indicator, otherwise the die set cannot be withdrawn. Be sure to align it to the horizontal line.
Slowly withdraw the die set.
Take out the desired die set from the rack to replace it with the one currently set.
Securely set the die set in position.
Put the replaced die set into the rack.
The replaced die set is supposed to be stored in the rack.
Close the multi puncher front door.