This command can be used if any surface vertex coordinates have to be manually changed. After selecting a point on the screen, the program searches for the closest vertex and displays the following window, where its coordinates can be viewed:

          Two types of modifications are possible. If only the vertex’s height is modified, one can change the slope of the triangles that share it. Additionally, the X and Y coordinates can be modified by clicking on the Designate button or by typing them in. This deletes the original vertex and a new vertex is created at the new position. The Block Height check box ensures that the Z coordinate is not changes when new coordinates are designated. Otherwise, the height will be calculated from the current surface.

          A vertex belonging to the surface can also be edited by editing a surveying point having the same coordinates.