To Change a Breakline Vertex Elevation or Location

Select the breakline either graphically or by using an AutoCAD command, such as Properties Edit (Pedit) or Change.
Perform the edit to the breakline.
If the breakline and surface definition become out-of-date, a is displayed next to its node in the Prospector tree.
Rebuild the surface to update the breakline definition by right-clicking the surface in the Prospector tree and clicking Rebuild.
Note: You can rebuild a surface automatically by toggling the check mark next to the Rebuild - Automatic menu entry available on the surface short-cut menu in Prospector. For more information, see To Rebuild a Surface Automatically.