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To choose a different brush color, click the top-most color in the Color Picker Tool (this is known as the Foreground Color), then select the desired color from the dialog box. You can also press the B key on your keyboard to select the Brush tool at any time.
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Simply locate and select the Brush tool from the Tools panel, then click and drag in the document window to paint. It's easy to use the Brush tool to paint in your document. Once you know how to use the Brush tool, you'll notice that many other tools, including the Eraser and the Spot Healing Brush, use a similar group of settings.
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You'll also have different settings to choose from, which can help you customize it for different situations. The Brush tool allows you to paint on any layer, much like a real paintbrush. en/photoshopbasics/doing-more-with-layers/content/ Introduction
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