Fairytale Scene - The Photoshop: Professional Retouching and Compositing Tips, Tricks, and Techniques - page 427

Figure 9.21
17. To keep all the parts of the retouching nicely organized so that we can find them
quickly should we need to, let's now put all the layers that go into the background
into a group. With the uppermost layer active, Shift-click the mystical_world layer
so that all layers in the Layers panel are highlighted ( Figure 9.22 ) . Go to Layer >
New > Group from Layers, and name it Room .