Activate Slope mode.
Enter 2%, the, confirm.
Align your boom with the trench.
Place the tip of the bucket on the surveyor's stake or benchmark, then click on “depth.”
Enter “2.5m” as the height (the height between your bucket and the bottom of the trench) then confirm.
Follow the instructions on the screen to achieve the desired slope.
Activate slope mode.
Enter 2% the, confirm.
Enter “0m” as the height (the height between your bucket and the bottom of the trench) then confirm.