What are blend modes in Photoshop?
Blend modes, or blending modes, are mathematical equations that use the RGB (red, green, and blue) color code and luminosity (levels of dark and light) to determine how pixels from a top layer (or blend layer) mix with the pixels in a background layer (or base layer). You can use Photoshop blend modes to create a double exposure effect or to get the exact color scheme you want with instant adjustments to brightness and contrast.
When should you use blending modes in Photoshop?
Try these ways of using blending modes to get a sense of how they affect the layers in a composite.