Specify an Analytical Alignment for a Structural Floor Edge
Align the analytical model of a structural floor edge with either auto-detect or projection alignment methods.
In an analytical view move the cursor to the floor edge and tab select the edge.
To specify Auto-Detect, click Modify | Analytical Floors tab Edge Horizontal Alignment panel (Auto-Detect). To specify Projection, click Modify | Analytical Floors tab Edge Horizontal Alignment panel (Projection). If Projection is selected, select an object to which the edge will be projected from the Projection drop-down menu.