1 Select the object with the Pick tool.
2 Click Effects, Lens.
3 Choose Brighten from the list box in the Lens Docker window.
4 Type a percentage value from -100 to 100 in the Rate box.
Values between 0 and 100% increase the level of brightness. Values between 0 and -100% increase the level of darkness.
5 Click the Apply button.
• You'll find the Brighten lens particularly effective for applying brightness or darkness to a bitmap image.
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