In this session we looked at setting up Design Layers, Levels, and Stories. There is always some choice about the elevation of Design Layers. The setting out of the Design Layers can be related to the top of the slab, and I usually set the elevation of the top of the ground floor slab to 0. Using a sketch section thru a project, we can set up project Design Layers and Levels to replicate the settings from the sketch. At the end of the movie we look at how to create a window that spans two floors.