Page 103 - Photoshop for Lightroom Users – Scott Kelby 2nd Edition

Step Four:
From the pop-up menu near the top left of the Layers panel (where it says “Normal”), change the blend mode to Linear Light (as seen here). At this point,
the image should just look like the normal image (not blurry, not gray, just normal, regular). Don’t worry, this gets a whole lot more interesting in a minute
(apologies to my editor, who I imagine just shuddered reading the phrase “a whole lot”).