Fairytale Scene - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 435

Figure 9.32
Now that we've added the contact and shape shadows for the toys, the floor looks
too bright and lacking in contrast.
3. In the Layers panel, click the arrow to open the Room group so that we can see all
the layers inside. Then click the uppermost layer in the group, hold down the Shift
key, and click the floor layer ( Figure 9.33 ) . Then go to Layer > Smart Objects >
Convert to Smart Object ( Figure 9.34 ).