Character Portrait - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 339

Note
You may notice that some of the fine hair contains traces of the background color.
This can be removed by going back into Refine Mask, but when we add the spot-
light they will no longer be visible.
Adding a Spotlight
Adding a spotlight in Photoshop means we can resize it, move it, make it harder/softer, or
remove it with just a few clicks.
1. Change the background layer to a color layer, use the Elliptical Marquee tool while
holding down the Shift key to drag a perfect circle over the model's face. The
circle should be just wider than the face and not close to the edges of the picture
( Figure 6.20 ) .