The eraser sits above and to the right of the color wheel. It is divided into a gray half (left) and a pink half (right). The gray half applies to the color mixers. Clicking on it removes the last color that was added to a mix. The pink half applies to the drawing. Clicking on it removes the last color applied to the drawing. The color may have been applied by drawing a pattern or filling an area. Clicking on the eraser repeatedly will erase a succession of color applications in reverse order.