Blend Mode
Blend Mode is a special option that many of the tools and commenting aids feature in PDF-XChange Editor. The Blend Mode option appears in the Properties Toolbar when objects that are compatible with this mode are selected. The mode selected determines the manner in which content blends with underlying/overlapping content. The following options are available:
Figure 1. Blending Options
•Normal maintains the selected Fill Color.
•Multiply multiples the Fill Color value with the color value of the underlying content. The resulting color will be at least as dark as one of the original values.
•Screen multiplies the complements of the Fill Color value with the color value of underlying content and then complements the result. The resulting color will be at least as light as one of the original values.
•Overlay either multiplies or screens the Fill Color value with the color value of underlying content, depending on the color value of the latter. The Fill Color will overlay the underlying content while preserving its highlights and shadows. The color of underlying content will be blended with the Fill Color to reflect its shade.
•Darken selects the darker of the Fill Color value and the color value of underlying content.
•Lighten selects the lighter of the Fill Color value and the color value of underlying content.
•Color Dodge brightens the color of the underlying content to reflect the Fill Color. Please note that if black is used as the Fill Color then there will be no effect.
•Color Burn darkens the color of the underlying content to reflect the Fill Color. Please note that if white is used as the Fill Color then there will be no effect.
•Hardlight either multiples or screens the Fill Color value with the color value of underlying content, depending on the Fill Color value. This creates the effect of shining a strong spotlight on the underlying color.
•Softlight either darkens or lightens the colors, depending on the Fill Color value. This creates the effect of shining a diffused spotlight on the underlying color.
•Difference subtracts the darker of the constituent colors from the lighter color.
•Exclusion performs a less contrasted version of the Difference option.
•Hue combines the Fill Color value with the saturation and luminosity of the color value of the underlying content.
•Saturation combines the saturation of the Fill Color with the hue and luminosity color value of the underlying content.
•Color combines the the hue and saturation of the Fill Color with the luminosity color value of the underlying content.
•Luminosity combines the luminosity of the Fill Color with the hue and saturation of the color value of the underlying content.