User Guide

Chapter 8 Editing
127
Exposure options
Preprocess
Exposure
Select this option if you want to use the levels and curves that were applied
during preprocessing, and make further changes to those levels and curves.
Clear this option if you do not want to use the levels and curves that were
applied during preprocessing and would prefer, instead, to select completely
new levels and curves. Selecting exposure options can be very time-
consuming, however, so the Preprocess Exposure option is selected by
default and it is recommended that you use the levels and curves that were
applied during preprocessing as a starting point for further adjustments.
Channel Specifies the brightness or color channel you want to adjust.
Shadows Specifies the blackpoint of an image.
Move the slider or type a number from 0 to 255 into the spin box, to define the
blackest area of an image. As the value increases, the dark colored areas of the
image become darker.
Midtones Specifies the gamma correction in an image.
Move the slider, or type a number from 0.00 to 2.00 into the spin box, to set the
amount of gamma correction. Higher values make the image appear brighter,
while lower values make the image appear darker.
Highlights Specifies the whitepoint of an image.
Move the slider, or type a number from 0 to 255 into the spin box, to define the
whitest area of an image. As the value increases, the light colored areas of the
image become lighter.
Clipped % Indicates how much of the image detail is lost due to blackpoint and
whitepoint correction.
Shadows
picker
Click the Shadows picker, and then click the image area you want to set as the
blackpoint.
Midtones
picker
Click the Midtones picker, and then click the image area you want to set as the
gamma correction value.
Highlights
picker
Click the Highlights picker, and then click the image area you want to set as
the whitepoint.
Exposure
Compensation
Specifies the brightness or darkness of the image.
Move the slider to the right to brighten the image to a maximum of +4. Move
the slider to the left to darken the image to a minimum of -4. The value
increments are approximately equivalent to f-stops.