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Exercise Files:
https://www.dropbox.com/scl/fi/4p53j9k1mfp9qehsb12hw/0018-Civil-3D-2023-Grading-Essentials.zip?rlkey=h3thf0wsfrzntzb8yekz0n8uq&dl=1

Editing the elevation of a grading baseline is what this exercise is all about. To account for the shift in elevation, the grading is adjusted.