Canon EOS Digital Photo Professional Instruction Manual page 61

Editing Images
The minimum number of steps between the shadow point and the highlight point is 8.
You can change tone curve interpolation methods or tone curve modes from the menu
that appears by clicking on a tone curve while pressing the <control> key.
You can change tone curve interpolation methods or tone curve modes (2-38).
Click White Balance Function
You can automatically adjust the white balance simply by clicking a point in a neutral part of the
image.
1
Click the [Click] button.
When you move the cursor over
the image, the cursor [ ] changes
to [ ].
2
Click a point in a neutral part of the image.
If you click on another point over the image, the white balance is adjusted again.
If you finish this operation, click the [Click] button.
The image is adjusted based on the value of 1
You can also adjust the white balance by clicking an achromatic color (neutral gray) part
of the image.
3-10
1 pixels from the clicked point.