Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual page 369

3 In the drawing, select the area label of the large parcel in the northeast
corner of the site.
4 Specify the start and end points of the parcel frontage as shown in the
following image.
Notice that when you move the cursor to specify the end point, a yellow
line displays the proposed frontage.
5 Click the northeast corner of the parcel to specify the swing point.
A preview graphic is displayed.
Exercise 4: Subdividing a Parcel with a Swing Line | 357