# Nodes not visible for material created in properties panel

Materials created in material properties are not showing up in the node editor in blender 2.70. Is there something I need to turn on? I've looked in user preferences and I don't see anything obvious.

Here are some possible causes:

1. You're working in Blender Internal rather than cycles:
2. You're working with the compositing nodes:
Make sure that the selected option is the little ball, not the one that's selected in the image.
In Compositing tab, Find Nodes under Select in the menu. Reference from here.