Imagine an image with a circle 50 pixels in diameter.

假设有一幅图像，上面是一个直径为50个像素的圆形。

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Select the Brush Tool, set the diameter to 400 pixels.

选择画笔工具，设置直径为400像素。

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Select the Brush Tool, set the diameter to 400 pixels.

选择画笔工具，设置直径为400像素。

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