I wonder what model you are using. The general steps are: start-up-enter the menu-lofting (F2)- select a file (any file is ok, because this mode does not save data)-input the station-input the coordinates and save them-input the coordinates and align them with the rear viewpoint (if prompted)-after lofting, ensure that there is no wrong data input and know the relative error of two points -ESC exits the menu mode-enters the data acquisition mode (f1.