Blender Nodes in Editor doesn't show preview Image I have a small problem with my blender lately. I want to make some compositing with my compositing nodes but the problem is, blender won't show me the preview Image. I have a Screenshot for you guys.



The preview Image itself is enabled, but it just won't show.

Thanks for your help in advance!

-Marten
You need to render the scene before anything shows on the compositor. HitF12 or press Render.


To have the Viewer Node's image as background behind the node tree you need to enable the backdrop button:



If you press N on the Node Editor's window  you'll see Controls for size and placement of the backdrop:



Or you can zoom in and out by pressing V or ALTV

You can also choose to see the Composite Node or Viewer Node in a UV/Image Editor window.
Selecting Render Result will display the Composite Node