I have lost all my markers and elevation levels (story heights), line indicates story levels but no height. Also sections have the same problem. I was trace referencing a large Autocad dwg and deleted the elevations, rather than hiding the layer, silly mistake. On placing new elevations I have no markers and heights in either plan(2D) or elevation view. I have gone through all the settings in elevation dialogue but have been unable to regain markers and dimensions. Any advice on how to get the elevations back to default settings????