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On the main window, hold down Polyline for Simple Grading and display the menu.
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Press “Extend grade...” in “Polyline”
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Input the grade of the leveling ground by using the numeric keyboard. The leveling ground surface (cross-sectional surface) which has the inputted grade is displayed on the Section view screen, and a horizontal line perpendicular to the polyline of Plan view screen is displayed.
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Start Simple Grading. Repeat step 1 for other polylines
