At present, drawing boards are equipped with refill changers. When changing pens, just slowly insert the pen into the bayonet of the pen changer, let the bayonet catch the refill, and then slowly pull it out, and the old refill will be pulled off and left on the pen changer.

First, clamp the new refill in the bayonet of the pen changer, then gently insert the long end of the new refill into the hole of the pen tip. When you hear a click, it means that it is clamped. Then, slowly pull the pen to let the pen take the refill out of the pen changer and put it back.

If there is no film changer, tweezers can be used. Hold the head of the old refill with tweezers and gently pull it out. The same is true for installing a new refill. Hold the head of the refill with tweezers and gently insert the pen back until you hear a click.

It is recommended that you do not change it for too long. The nib is worn too much, and the rest will become shorter, making it difficult to pull it out.