I am very new to using lisp routines, so please excuse my ignorance. I have noticed that I have been using AutoCAD to get the sectional properties of built up sections quite often. To do this, I generally draw the shape, make it a region, and use massprop to get the centroid, area, moment of inertia, etc of the shape.   I would then copy and paste the info onto a titleblock along with the shape, and manually enter the centroid (place a point and change the point style in order to easily see i