You have to use the Samsung keyboard first of all. If you are then just press and hold the microphone key to the left of the spacebar, 8 new buttons pop up and you need to click on the one with the "T" and the pen symbol. This will bring up a blank area which you can now write in. You can also go into your settings and adjust it so that when the s pen is out anytime the keyboard is in use it automatically goes to handwriting mode. Hope this helps!