Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual page 731

When prompted for the reference work plane, click along the lower edge
of the frame object.
5 Right-click Top of Box and then click Set View. Next, click View tab
Views panel SW Isometric.
This sets the working plane to Top of Box and then returns the drawing
to its original view.
6 Right-click Top of Box
are prompted for a modifier.
7 Click the 3D frame object. When prompted for the geometry to project,
click one of the lower edges. The line highlights in red when the cursor
Exercise 3: Defining the Vault Box Geometry | 719
Add Geometry Projected Geometry. You