Hide a Layer from View?

In the Layers panel, just click on the little Eye icon to the left of the layer’s thumbnail and it hides that layer from view. To see it again, click where the Eye icon used to be. To see just one particular layer (and hide all the rest), press-and-hold the Option (PC: Alt) key, and then click on the layer’s Eye icon. All the other layers will now be hidden, and just that one layer will remain visible. To bring ’em all back, Option-click on that Eye icon again.