Use the Grade Extension By Reference command to edit an elevation by extending the grade of a segment on another feature.
This command is used to apply the same grade from a segment across a gap to a point on another feature line. For example, you can extend a grade across an intersection.
The segment is highlighted and the grade and slope are displayed in the command line.
As the cursor is moved along the feature line, it snaps to the nearest point that you can edit, displaying a yellow line from the reference point to the edit point.
The grade, slope, elevation and distance to the point are displayed in the command line.
The assigned elevation for the point is displayed at the command line.