Z ordinates
In 3D models there is also a Z ordinate. The Civil AccuDraw tool box allows the choice of absolute Z (Z) or delta Z (dZ). The Z ordinate is not stored with the ordinates system but functions independently of the XY Ordinates.
Key-in: civilcoord zmethod dz/z
Note: To learn more refer to the below MicroStation help topics:
To Constrain the Pending Data Point to a Drawing Plane Axis