How To Work With Object Styles in AutoCAD Civil 3D.

To copy, edit, or delete an existing object style

• On the Settings tab in Toolspace, right-click an object style collection New
• On the Settings tab in Toolspace, expand an object style collection  right-click object style Copy, Edit, or Delete.

Note: You cannot delete a style that is referenced in the drawing.

To change style settings

1. On the Settings tab in Toolspace, right-click an existing object style and click Edit.
2. Review and edit settings on the various tabs of the Style dialog box.

To specify a different style for an object

1. Select the object in the drawing.
2. Right-click and click Properties.
3. In the Properties palette, select a different style.