You can also access this tool by clicking Structure tabFoundation panelSlab drop-down (Floor: Slab Edge).
Select horizontal edges of structural floors to place a slab edge.
You can also click model lines. As you click edges, Revit treats this as one continuous slab edge. If the slab edge segments are created in the same placement session and meet at corners, they miter.
Click Modify | Place Slab Edge tabPlacement panelRestart Slab Edge.
Slab edge added to a structural floor
You can place slab edges in 2D views (such as plan or section views) or in 3D views. Watch the status bar to look for valid references. For example, if you are placing a slab edge on a floor, the status bar might display: Floors : Basic Floor : Reference.
When placing a slab edge in a section view, place the cursor near the corners of the structural floor to highlight the reference.
After placing slab edges, you can modify them in several ways.