Adobe INDESIGN 2.0 - USING HELP Help Manual page 291

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Lighten Selects the base or blend color—whichever is lighter—as the resulting color.
Areas darker than the blend color are replaced, and areas lighter than the blend color do
not change.
Difference Subtracts either the blend color from the base color or the base color from the
blend color, depending on which has the greater brightness value. Blending with white
inverts the base color values; blending with black produces no change.
Exclusion Creates an effect similar to, but lower in contrast than, the Difference mode.
Blending with white inverts the base color components. Blending with black produces
no change.
Hue Creates a color with the luminance and saturation of the base color and the hue of
the blend color.
Saturation Creates a color with the luminance and hue of the base color and the
saturation of the blend color. Painting with this mode in an area with no saturation (gray)
produces no change.
Color Creates a color with the luminance of the base color and the hue and saturation of
the blend color. This preserves the gray levels in the artwork, and is useful for coloring
monochrome artwork and for tinting color artwork.
Luminosity Creates a color with the hue and saturation of the base color and the
luminance of the blend color. This mode creates an inverse effect from that of the
Color mode.
Note: The Difference, Exclusion, Hue, Saturation, Color, and Luminosity modes do not
blend spot colors.
Isolating blending modes
When you apply blending modes to objects in a group, the effects of the blending modes
are normally seen on any objects beneath the group.
You can use the Isolate Blending option to change the behavior of blending modes, so
that only members of the selected group are affected; objects beneath the group are
unaffected by the blending modes. This prevents a background object from altering
the result.
Note: The Isolate Blending command is only useful for groups containing objects that
have a blending mode other than Normal applied to them.
Group selected without Isolate Blending (left), and same
group with Isolate Blending option applied (right)
Consider the following interactions when isolating blending modes in InDesign:
To isolate only the image inside a graphics frame, use the direct-selection tool to select
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the object when you apply the blending mode.
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Working with Transparency
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