Debugging from the start

[Graham Samuel]

Doubtless this is a naive question, but how can I trace the action of 
a stack from the moment of opening (I mean starting with its startup 
or at least its preOpenStack handler). AFAIKS I can only open the 
Script Debug Window for a given stack after that stack has been 
opened. Can't find anything in the docs about this.

TIA as ever

Graham
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          Graham Samuel / The Living Fossil Co. / UK & France