Working with Styles in Civil 3D:

Switching Styles:

1. Select the object(s) to change.
2. Right-click and select "Object Style" or use the "Object Style" command.
3. Choose the new style from the list.

Deleting Styles:

1. Go to the "Settings" tab.
2. Click "Object Style" and select "Manage Styles".
3. Choose the style to delete.
4. Click "Delete" and confirm.

Additional Tips:

- Use the "Style" command to switch styles for multiple objects at once.
- Use the "Object Style Manager" to rename, copy, or delete styles.
- Be cautious when deleting styles, as it will remove all instances of that style in the drawing.
- Use the "Purge" command to remove unused styles from the drawing.

Best Practices:

- Establish a consistent naming convention for styles.
- Use the "Object Style Manager" to keep styles organized.
- Document style usage and changes for future reference.
- Use the "Switch" command to quickly change styles, rather than re-creating objects.