When you get this pen, Simply shake the bottle well before use and pump the tip until the color starts to flow.
Open the lid, you will see the nib is high stiff and white thing.
Find a stiff plane place and press the nib.( pen point is flexible and you can press It's like a switch)
Then cover the lid and swing it several times, you will see the color runs to the lid.
Easy huh? If the first time the water is not enough, just cover the lid and swing more times. Very simple, everybody can control it.