You can customize your brushes and save them. Yet, many still tweak the Pencils and Pens to their style. Many users find they use the default Erasers, Flood Fill, Solid Paint Brush, and Airbrush. However, you may want to add to the existing custom brush sets in the Brush Library by creating new brushes to suit your purposes. The brushes we ship with SketchBook Pro are great and you can do almost anything with them.