I'm drawing in Skethup for example an exterior wall that has a lenght of 20 meters, I would like to know if the line I'm drawing is the exterior line, the interior line, or the middle line of the wall. I don't know, in other words, from where OpenStudio will put the wall-layers when I will import the model in OS. For understanding better, the BIM software Revit does this differentiation when you draw the wall, defining if the line I'm drawing is the outer boundary of the wall, the inner boundary, or the axis line (in the middle).