Re: [graphviz-interest] nicer organization chart

You are not abusing subgraphs, and the use of invisible edges is a 
common trick.
As an alternative, you could use staggered minlen attributes on the 
edges. For example,
remove the subgraphs and use,

    "Step2.1" -> "note1";
    "Step2.1" -> "note2" [minlen=2];
    "Step2.1" -> "note3" [minlen=3];
    "Step2.1" -> "note4" [minlen=4];

As an alternative alternative, you can use the unflatten filter, again 
after removing the subgraphs:

   unflatten -ll 4 input.gv | dot


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