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135
Adobe Photoshop Help
Making Color and Tonal Adjustments
Using Help
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Contents
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135
To use the eyedropper tool and Color palette to see color values:
1
Choose Window > Color to open the Color palette.
2
Open the color adjustment dialog box. This activates the eyedropper tool outside the
dialog box and over the image.
3
Click the pixel you want to check in the image.
4
Make the adjustments in the dialog box, and before applying them, view the adjusted
color values in the Color palette.
Saving and reapplying settings
The Save and Load buttons in the Levels, Curves (Photoshop), Hue/Saturation, Replace
Color (Photoshop), Selective Color (Photoshop), and Variations dialog boxes let you save
your settings and apply them to other images.
To save and reapply settings:
1
Click Save in the adjustment dialog box you are using, and name and save the settings.
2
Close the adjustment dialog box, and open the image to which you want to apply the
adjustments.
3
Reopen the adjustment dialog box, and click Load. Locate and load the saved
adjustment file.
If you often apply the same adjustment, consider recording and running the
adjustment as an action.
Comparing corrections in CMYK and RGB (Photoshop)
Even though you can perform all color and tonal corrections in either CMYK or RGB mode,
you should choose a mode carefully. Whenever possible, avoid multiple conversions
between modes, because color values are rounded and lost with each conversion. If an
RGB image is to be used on-screen, you needn’t convert it to CMYK mode. Conversely, if a
CMYK scan is to be separated and printed, you needn’t perform corrections in RGB mode.
If you must convert your image from one mode to another, it makes sense to perform
most of your tonal and color corrections in RGB mode and use CMYK mode for fine-tuning.
Advantages of working in RGB mode include the following:
•
You can save memory and improve performance because you are working with fewer
channels.
•
You have more device independence, because RGB color spaces are not dependent on
inks. Corrections made to the image are preserved regardless of the monitor, computer,
or output device used.
•
The gamut of RGB spaces is much larger than that of CMYK spaces, so more colors are
likely to be preserved after adjustments.