About the Paint Tool
The main tool you will use to paint your drawings is the Paint tool. The Paint tool can be used in several different modes, and can be customized in the Tool Properties view.
The Paint tool only paints closed zones. If you have gaps in your lines, you must close them using either the Brush, Pencil, or Close Gap tools.
To learn more about the Contour Editor properties, see Paint, Paint Unpainted and Unpaint Tool Properties.