2022

A Guide to QuarkXPress 2022 | 395
Desaturate - To convert a color picture to a black-and-white picture while ●
leaving the color mode and lightness value of each pixel unchanged. For
example, it assigns equal red, green, and blue values to each pixel in an RGB
picture to make the picture appear grayscale
Invert - To invert the gray values of each channel in a picture. This effect is ●
recommended for 1-bit, grayscale, and RGB pictures. Because CMYK
pictures contain a black channel, this effect is not recommended for CMYK
pictures. The inversion of the black channel usually results in images that
are mostly black or mostly white.
Threshold - To convert color pictures to black and white, without using gray. ●
Enter a value in the Threshold field or drag the slider; all pixels lighter than
the threshold value are converted to white and darker pixels are converted to
black.
Posterize - To modify the tonal levels for each channel in a picture to ●
produce special effects. To use the Posterize dialog box, enter a new value in
the Levels field or drag the slider. For example, choosing five tonal levels in
an RGB image results in 15 colors (five for each of the three primary colors)..
Blend Mode
Use the Blend Mode drop-down menu to select a blend to apply to the image.
Opacity
Use the Opacity drop-down slider to select a the opacity percentage to apply to
the image.