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• Previous versions of the trees
  This is easily done by saving our old versions and making our changes to a new “current” copy of them. If we ever need to go back for an idea we previously discarded, it will be there waiting for us.
  
  
• Decisions and our rationale for them
  As we revise and reword individual items or entire sections of a tree, we can annotate them with our decisions and a brief rationale (where needed). We can also use color-coding or text styling to distinguish items that were deleted, changed, or are placeholders for future content.
  ~ss
  In the example below, we've color-coded deleted item as red (some marked as "future" for later releases), and added rationale and instructions for other items:
  
  Image Added
  
  
  

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