Existing Elevation Data

Looking for help with QGround Control settings. When creating a new mission, the launch altitude is set to zero and effects the elevations for the rest of the way points and I cant get the mission altitude to follow the ground elevation profile. In the Mission height display the existing ground elevation profile stays at 0m and I am required to create a mission that maintains a fixed altitude above ground elevation. If anyone else has done the training for the Deltaquad pro, I am referring to Exam II d Mountain Mission.