Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual page 804

The label returns to the original layout property settings, and all other
style controls in this area are disabled. This type of dragged-state format
is easy to apply, but is not suitable for all label types. In particular, note
that the leader line does not adapt well to all possible dragged locations.
4 Change the Display value back to Stacked Text. Click Apply.
If your label has multiple lines of text, the Stacked Text setting keeps
them all stacked horizontally in a compact block. You can see this in
action by dragging one of the curve labels from its layout location.
5 Change each of the following property values. Click Apply after each
change to see their effects.
Leader Type: Spline Leader
Border Visibility: True
Border Type: Rounded Rectangular
Border and Leader Gap: 2.0mm
Leader Attachment: Top Of Top Line
6 After you have applied all the changes that you want to see in the dragged
state, click OK.
792 | Chapter 19 Labels and Tables Tutorials