Page 59 - Photoshop for Lightroom Users – Scott Kelby 2nd Edition
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10. To Select Multiple Layers:
Press-and-hold the Command (PC: Ctrl) key, and then click on the layers you want to select. If the layers are contiguous, press-and-hold the Shift key, click
on the first layer, and then click on the last one to select them. While selected, they’ll now move as a group.