I am a landscape architect, not an architect. The software I use modifies terrain in seconds. I have a new client that uses Chief and for the structure side of things, it's a dream. This client sends me completed site plans with existing elevations in place. How do I raise or lower a flat space behind or in front of a retaining wall that I draw? I am sure it's simple but this is starting to hurt my brain. These homes have all been on slopes exposing stem walls that I am trying to conceal with retaining walls and landscape. Please help...