deke.com posts about Underlying Layer

Deke's Techniques 056: Coloring the Stripes on a Zebra

You may have heard that a leopard can't change it's spots. But a zebra can most assuredly change its stripes, with a little help from Deke and Photoshop.

Photoshop Top 40, Feature #19: Luminance Blending

Deep inside the Layer Style dialog box are two slider bars, This Layer and Underlying Layer, that let you blend pixels by brightness. Despite their dull names, these sliders rank among the most powerful features in Photoshop.