Story Support (Symbols) – When you place a symbol in a design, you can choose the elevation of that symbol. But you might have a situation where you want most of the symbols to be at the same elevation. If this was the case you could set the elevation of the objects as you create the symbol. But on another project you might want to use the same symbol but vary the height. Story support the symbols allows you to connect the elevation of the symbols to a level of your story. This would allow you to control the symbols by a level, but you might have a different elevation on each story of the building.