Understanding the Layers Palette

Select this option to change how two or more layers interact or "blend" together.Opacity.
Select a value from 0 to 100 percent to change the opacity of the active layer.Fill.
Select a value from 0 to 100 percent to change the opacity of the active layer without changing the opacity of any applied layer styles.Lock options.
Click the Lock Transparent Pixels, Lock Image Pixels, Lock Position, or Lock All button.Link Layers.
Hold down the Shift key and click to select two or more layers, and then click this button to link the layers (

Click this button, and then select from the available layer styles.Add Layer Mask.
Click this button to apply a layer mask to the active layer, click this a second time to add a vector mask to the active layer.Create New Fill Or Adjustment Layer.
Click this button, and then select from the available fill or adjustment layers.Create New Group.
Click this button to create a new set. A set is a folder where you can drag, store, and organize layers.Create New Layer.
Click this button to create a new layer in the active document.Delete Layer.
Click this button to delete the active layer.Layers Options.
Click this button to access a menu of layer specific commands.
