Civil 3D Delete points from surface

To perform this operation, ensure that the surface style has triangles or points visibility enabled. For more information, see About Surface Styles and Visualization.
Note: TIN or grid volume surfaces do not support editing operations.
In Toolspace, on the Prospector tab, expand the surface Definition collection, right-click , and click Delete Point.
At the command line, you are prompted to select points.

Click the points you want to delete from the surface.
Press Enter.
The selected points are deleted from the surface.

Note: When you delete an interior point from a grid surface, an interior border, following the adjacent grid lines, is created.
Optionally, continue to select other points to delete by clicking them.
Press Enter to complete the operation.
The points are not deleted from any of the existing surface data components. The deleted point operations are added only to the surface definition.

The deleted points are added as Delete Point, Delete Multiple Points, or Delete Grid Point operations to the Edits list view in Prospector.

Note: The Description column in the list view displays the coordinates and elevation for the points that were deleted.

[ProjectPB]

how to add point, thanks for delete point