There are 17 blend modes. These are as described right in the PSP help file.
| | Normal |
simple blend - covers over the image based on the number set for opacity.
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| | Dissolve |
speckled effect, more so with higher opacity setting
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| | Hue |
hue from flood is used
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| | Darken |
dark areas overwrite image, lighter areas of flood ignored
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| | Lighten |
lighter colors of either flood or underlying are used
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| | Overlay |
combination of screen and overlay modes; tends to let both existing shadows and highlights show through
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| | Hard Light |
same combo of modes, but tends to add highlights and shadows
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| | Soft Light |
same combo of modes, and tends to add soft highlights and shadows
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| | Dodge |
lightening, and already light areas emphasized
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| | Burn |
darkening effect
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| | Luminance |
floods based on luminance, not color
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| | Color |
hue and saturation flood, underlying luminance unaffected
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| | Difference |
color subtraction, based on lightness
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| | Exclusion |
similiar to difference mode, but effect is somewhat less
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| | Saturation |
flood saturation applied
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| | Multiply |
darkening effect which tends to particularly darken already dark areas
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| | Screen |
lightens image
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