There are several new features in Photoshop CS6 that make working with layers more efficient.
• In previous versions of Photoshop, we could select the Move tool (or the Marquee, Lasso, Quick Select etc. – basically any tool that didn’t have an Opacity setting), and use the numeric keys on the keyboard to change the opacity of a layer. Tapping one number assigns the percentage of the tapped number (1 = 10%, 2= 20% etc. and 0 = 100%). Tapping two numbers quickly will give you that exact amount (5 + 4 = 54%). In Photoshop CS6, tapping 0 + 0 quickly will set the Layer’s opacity to 0 (zero). This works with either a single layer or multiple layers selected.
• With multiple layers selected, you can now change the Blend Mode for all selected layers.
• If a layer is targeted (selected) in the Layers panel, but hidden (the eye is toggled off) the Opacity and Blend Mode are now visible.
• With multiple layers selected, you can now lock all selected layers by tapping the lock icon.
• With multiple layers selected, Command + J (Mac) | Control + J (Win) will duplicate the selected layers. This shortcut works for Layer Groups as well.
• With Multiple layers selected, Control -click (Mac) / Right Mouse -click (Win) on the eye icon in the Layers panel to change the color label of all selected layers at once.