DraftSight Mechanical DraftSight Mechanical is a DWG-based 2D and 3D design solution. It includes DraftSight Premium and the capabilities to serve comprehensive mechanical design needs. Contents Managing Mechanical Layers and Layergroups You can manage Mechanical layer definitions, layer properties, and layergroups. Mechanical Utilities You can use Mechanical Utilities for various situations while working with the program. Working with Part References Part References mark a geometry as a part to include in Bills of Materials (BOMs) and Parts Lists. Balloon Insertion Options You can create and place balloons for specified Part References that have not been ballooned. Mechanical Settings Dialog Box: Snaps You can use the Snaps category of the Settings dialog box to manage and control Mechanical Snap Configurations. Command -AM_Layergroup You can use the -AM_Layergroup command to manage layergroups and layergroup properties. Command -AM_Layer You can use the -AM_Layer command to manage layers and Mechanical layer definitions.