watch as the water runs down into the pool, pressure increases then... WHOSH! the water is thrown into the air. you can watch the pressure in the variable in the corner. To set the 'note pressure' press N, then press M at any time to set the presssure to your note pressure.Press B to change the land, which I recomend you do just after the water is lauched and before they come back down. the button beside the pressure is the pen button, blue is off, green is on, and yellow is individual pen. In individual pen place the mouse over the water you want to track then press P to turn its pen on and off. O clears the pens.