The Power of Gray - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 112

Figure 2.36
5. In the options at the top of the screen, use the following settings: Mode: Normal;
Opacity: 100%; Flow: 100%; Sample: Current & Below ( Figure 2.37 ).
Figure 2.37
With the cutout selection visible, use the Clone Stamp tool to remove unwanted
areas of the background ( Figure 2.38 ) .