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Brightness Buttons
You may adjust the overall brightness of the image by clicking on the up and down arrow buttons. Each click will change the brightness by five units within the range of -100 (very dark) to +100 (very light).
Tip: For finer control, hold down the key while clicking the button. This will cause the brightness to change by single units.
Here is an example of what the Brightness control does:
Contrast Buttons
In a similar fashion, you may adjust the Contrast of your image with the corresponding Contrast controls.
Tip: For finer control, hold down the key while clicking the button. This will cause the contrast to change by single units.
Here are some examples of how the Contrast control works:
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