Sony DCR-TRV39 - Manual (Page 186)

As you adjust these qualities by operating the sliders, the resulting
picture will be displayed in the preview window.
Preview window
Displays a preview of the altered image.
Brightness
Drag the slider to adjust the brightness of the image.
Contrast
Drag the slider to adjust the contrast of the image.
[OK] button
Click to apply the adjusted brightness/contrast.
Hue, Saturation
After selecting the color you want to adjust, drag the slider while
checking the results in the preview window.
Preview window
Previews the results of changes made to hue, saturation and
lightness settings.
All
Click to adjust the hue, saturation and lightness of all colors in the
image.
Red
Select to adjust the hue, saturation and lightness of this color.
Yellow
Select to adjust the hue, saturation and lightness of this color.
Green
Select to adjust the hue, saturation and lightness of this color.