Brush/Pencil/Color Substitution/Mixer Brush Tool Function: used to represent the brush or pencil effect, or replace Website production A color in an image. The following figure uses the color replacement tool to replace the color of flowers and enhance the visual effect of flowers. History Brush/History Art Brush Tool Function: used to express unique brush texture or restore image. Lighten/deepen/sponge tool Function: used to reduce and deepen the hue of the image, and adjust the hue and saturation of the image. The following figure uses the sponge tool to enhance the saturation of buildings in the picture. Gradient/Paint Bucket Tool Function: fill with specific color or gradient color. The following figure comprehensively uses the gradient tool and the "Overlay" layer blending mode to change the color of the picture.