You can create these rendering nodes from the Hypershade Create bar.

Render Layer

Create this node to divide objects into separate layers. For more information about render layers, see Render layer concepts.

Render Pass

Create render passes such as Diffuse, Specular, and Ambient using this node. Fore more information about render passes, see Multi-render passes.

Render Target

To visualize a node (such as a shading node or render pass) in the Render View or in a batch render, connect it to a Render Target node. For more information about using render targets, see Previewing your composite in the Render View.