GGU-UNDERPIN: Step 4: Define geometry of the underpinning body
From the "Editor 1" menu select "Body (geometry)".

Change the number of points to 3 and enter the values shown above. The depth values are relative to the top of the wall elevation. For every depth two coordinates (left and right edge of the wall) need to be given (see "Theoretical principles/Underpinning body").
After closing the box press [F9] for optimised graphics display.