Creating Views > Working with ECAD Color and Visibility > To Display ECAD Regions, Areas, and Lightweight Holes in the Model View
  
To Display ECAD Regions, Areas, and Lightweight Holes in the Model View
1. In an open model view, click Home > Filters. The Creo View Options dialog box opens.
2. Under Model Construction Geometry, select the Datum Curves check box.
3. Click OK. Regions and lightweight holes are visible.