diff --git a/lib/graph3d/Graph3d.js b/lib/graph3d/Graph3d.js
index 8ce1c457..102312a9 100644
--- a/lib/graph3d/Graph3d.js
+++ b/lib/graph3d/Graph3d.js
@@ -146,21 +146,21 @@ var DEFAULTS = {
   },
 
   // Following stored internally with field prefix 'default'
-
-  xBarWidth : 1,
-  yBarWidth : 1,
-  valueMin  : 0,
-  valueMax  : 1,
-  yBarWidth : 1,
-  xMin      : 0,
-  xMax      : 1,
-  xStep     : undefined, // auto by default
-  yMin      : 0,
-  yMax      : 1,
-  yStep     : undefined, // auto by default
-  zMin      : 0,
-  zMax      : 1,
-  zStep     : undefined  // auto by default
+	// All these are 'auto by default'
+
+  xBarWidth : undefined,
+  yBarWidth : undefined,
+  valueMin  : undefined,
+  valueMax  : undefined,
+  xMin      : undefined,
+  xMax      : undefined,
+  xStep     : undefined,
+  yMin      : undefined,
+  yMax      : undefined,
+  yStep     : undefined,
+  zMin      : undefined,
+  zMax      : undefined,
+  zStep     : undefined
 };