graph-pane y-adjust

The second to last example for GRAPH-PANE in the CAPI reference manual
starts with:

  "This example demonstrates a different style of graph output with
   right-angle edges and parent nodes being adjusted to the top
   instead of the center."

However, no matter which value I use for :Y-ADJUST I don't see a
difference - the graph always looks the same (and the nodes are /not/
adjusted to the top).   [LWW 4.4.5]

Am I missing something?

Thanks,
Edi.