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A painting tool is a tool or function in a graphics editing or painting program used to change the area of the canvas or image by adding paint strokes or filling the areas with color. The most common painting tools are the brush and the pencil, which can be found in just about any type of drawing or painting program, from simple ones like MS Paint to professional graphics software such as Photoshop.
A painting tool is used to alter an image by creating strokes and adding color, just like painting tools in the real world. The pencil tool is used to add free-form lines, and the width of the pencil can be adjusted, as well as its opacity and hardness. The brush tool can have many different types of brushes, just like its real-world counterpart, but what makes the digital brush tool more versatile, especially in programs like Photoshop, is that user-defined brushes with unique patterns can be added. For example, one can create a grass pattern for the brush and then paint it on the digital canvas to easily create a field of grass just by brushing the cursor across the screen. Another common painting tool is the fill tool, which fills a continuous area with a particular color or pattern.
Painting tools can be used to paint a single pixel or color an entire canvas, and each type of painting tool has its own set of functions and options that can be used to create unique art styles. Other painting tools include the eraser, airbrush, smudge and blur tools.