Custom-Defaults.md

@@ -70,6 +70,10 @@ def init_vdmk3(node):
     node.point_size = 2.0
 ```
 
+this default function will generate nicely shifted colour palettes for the viewer node, whenever you add a new viewnode with that bl_idname, like this
+
+![show repeated adding of viewernode results](https://cloud.githubusercontent.com/assets/619340/26029259/f58e2708-3830-11e7-8d8e-e3626734a507.png)
+
 ------------------
 
 Each time you add a node, the `node_default_dict` is checked if the `bl_idname` has an entry.