Thanks so much! When you draw on a computer you can use a mouse, but most professional artists use a graphics tablet which is a piece of technology (mine is the size of like an Ipad or something similar) which you use to move the cursor mouse on the screen. It has pressure sensitivity so when you lean on your tablet your lines will be thicker or thinner when you draw lightly. It makes drawing a lot easier. Let me know if that clears things up, I'm not the best explainer.