The screen displays: current chainage, the azimuth angle of the tangent on the chainage, and the function key of the establishing new line. The system provides four functions: defining line, curve, spiral, and point.
Select a function key, enter the detailed information of the chainage, the alignment elements will be created. Press BACK to calculate the new chainage and azimuth angle automatically and return to the alignment main menu. Now other line type can be defined. Press ESC to quit the present screen and return to the screen of alignment element. Modification on the element entered
previously is available.