Blend Modes in Photoshop Elements 11
Blend modes that darken
Darken: Turns lighter pixels transparent if the pixels on the target layer are lighter than those on layers below. If the pixels are darker, they’re unchanged.
Multiply: Burns the target layer onto the layers underneath, thereby darkening all colors where they mix. When you’re painting with the Brush or Pencil tool, each stroke creates a darker color, as though you’re drawing with markers.
Color Burn: Darkens the layers underneath the target layer and burns them with color, creating an increased contrast effect, like applying a dark dye to an image. Blending with white pixels has no effect.
Linear Burn: Darkens the layers underneath the target layer by decreasing the brightness. This effect is similar to Multiply but often makes portions of an image black. Blending with white has no effect.
Darker Color: When blending two layers, the darker color of the two colors is visible. This mode comes in handy when overlaying elements like scanned sheets of music, handwritten letters, or logos over your images and you want the white portions to appear transparent.