Adobe PHOTOSHOP 5.0 User Manual page 132

124 CHAPTER 6
Making Color and Tonal Adjustments
2 Choose Shadows, Midtones, or Highlights to
select the tonal range on which you want to focus
the changes.
3 With RGB images, select Preserve Luminosity to
prevent changing the luminosity values in the
image while changing the color. This option
maintains the tonal balance in the image.
4 Drag a triangle toward a color you want to
increase in the image; drag a triangle away from a
color you want to decrease in the image.
The values above the color bars show the color
changes for the red, green, and blue channels. (For
Lab images, the values are for the a and b
channels.) Values can range from –100 to +100.
For a color illustration of adjusting the color
balance, see figure 6-4 on page 226.
Using the Hue/Saturation command
The Hue/Saturation command lets you adjust the
hue, saturation, and lightness of individual color
components in an image. Like the Color Balance
command, this command relies on the color
wheel. Adjusting the hue, or color, represents a
move around the color wheel. Adjusting the
saturation, or purity of the color, represents a
move across its radius.
You can also use the Colorize option to add color
to a grayscale image converted to RGB, or to an
RGB image—for example, to make it look like a
duotone image by reducing its color values to one
hue.
For a color illustration of hue, saturation,
and brightness, see figure 4-1 on page 223.
To adjust an image using Hue/Saturation:
Open the Hue/Saturation dialog box, as
1
described in "Using color adjustment commands"
on page 105.
A B C D
A. Adjusts fall off without affecting range B. Adjusts range
without affecting fall off C. Moves entire slider D. Adjusts
range of color component
Two color bars are displayed in the dialog box.
These bars represent the colors in their order on
the color wheel.
The upper color bar shows the color before the
adjustment; the lower bar shows how the
adjustment affects all of the hues at full saturation.
2 Choose which colors to adjust:
Choose Master from the Edit menu in the dialog
•
box to adjust all colors at once.
Choose one of the other preset color ranges
•
listed for the color you want to adjust. An
adjustment slider appears between the color bars,
which you can use to edit any range of hues. (For
information on how to modify the slider's range,
see the instructions later in this section.)