Once you have your spots measured out on your pool table (see here for correct measurements), you align the stamp above the spot on the pool table. The great thing with this unit is that the ink part of the stamp is enclosed within the unit. You can move the unit anywhere on the billiards table without getting ink on the pool table. Once it is aligned, you hold the bottom of the unit with your fingers and with the other hand, you press firmly down on the stamping unit and an impression is made on the cloth. The more times you stamp, the darker the stamp gets. But you have to be careful with multiple stamping. You must keep the unit perfectly in place each time you stamp the cloth. Typically you shouldn’t need to stamp more than 5-8 times for the ink to be dark.