Many architectural, engineering and construction firms are leveraging scanned point cloud data to capture accurate as-built conditions. Autodesk Recap 360 is used to modify the point cloud - http://www.autodesk.com/products/recap-360/overview
Dejan Skenderovic from Pluralsight and Cadalyst author has created the following video to show how to select, group, and annotate a point cloud - https://www.youtube.com/watch?v=c_5mb2Xv1TM
