Canon EOS DIGITAL Instruction Manual page 38

Editing RAW Images
You cannot use the personal white balance if you have not registered it.
Adjusting the Brightness
You can adjust the brightness in the range of –2.0 to +2.0 (in one-sixth-stop increments for the
slider, and in 0.01-stop increments when entering a value).
1
Click the [Brightness (RAW)] button.
The [Brightness adjustment]
dialog box appears.
Alternatively, you can display this
dialog box by selecting
[Adjustment] menu
adjustment (RAW)].
2
Adjust an image while viewing it.
Drag the slider left or right to adjust the brightness.
3
Click the [Close] button.
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[Brightness
Restores the image to its original settings.
Enter a value to adjust the brightness.