2022

A Guide to QuarkXPress 2022 | 394
Levels - To brighten highlights, compress shadows, and adjust midtones ●
individually.
Curves - To make precision tonal adjustments to lighten or darken a picture. ●
Instead of limiting adjustments to shadows, highlights, and midtones, you
can adjust any point along a scale of 0% to 100% (for CMYK and grayscale)
or 0 to 255 (for RGB). The precise nature of this tool requires more
experience and knowledge than using the Levels effect.
Brightness/Contrast - To adjust the tonality of every pixel instead of ●
individual channels. .
Color Balance - To remove unwanted color casts or correct oversaturated or ●
undersaturated colors. This effect changes the overall mixture of colors in a
picture for generalized color correction.
Hue/Saturation - To adjust the overall color intensity and light in a washed-●
out or muted picture, but is generally used as a special effect. The picture’s
current hue (color cast), saturation (intensity), and lightness (degree of white
light) are expressed as zeros by default.
Selective Color - To increase or decrease the amount of process color in ●
each of the primary colors in a picture. For example, if an apple is too purple,
you can take cyan out of the areas that affect red.
Gamma Correction - To adjust the white point. Adjusting the white point ●
controls the brightness of the picture’s display on screen. To use the Gamma
Correction dialog box, adjust the midtones by entering a new value in the
Gamma field or by dragging the slider. A higher value produces a darker
picture, overall.
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Although modifying gamma gives you some control over picture display,
differences between Windows and Mac OS may still cause issues. Windows
uses a higher gamma value (2.2) for display than Mac OS (1.8), so the same
picture will look darker on Windows.