Using Layers or Classes in Vectorworks

I have been reading a discussion on the Vectorworks Discussion email list about how to set up drawings for a renovation project. Some people prefer to use a extra layer for the existing building, I prefer to use one layer for each story of the building. Everything that relates to that floor of the building is on that layer. Yes, this means lots of classes, but with the visibility tool, they are easy to turn on and off. 


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