About the Eraser Tool
Using the Eraser tool, you can remove parts of your drawing. When erasing brush strokes and painted areas, the contours will keep the shape you traced. When erasing pencil stroke, the central vector will be erased and the line tips will reshape based on the line's parameters.
It is a good idea to create and save erasers with precise sizes and parameters in order to save time when drawing and designing. Toon Boom Harmony provides you with a variety of default eraser styles and allows you to create and save your own.
Eraser presets are created by saving the properties of the current eraser as a preset, in order to reuse it again and again.
The Eraser tool uses its own preset list, separated from the Brush tool.