Adding Construction Geometry > About Construction Geometry
  
About Construction Geometry
You can create construction geometry and use it as a reference for a number of operations:
Translating or rotating parts along an axis
Positioning a section plane
Creating measurements
You can load and clear construction geometry and save them as annotation sets.
You can hide construction geometry and use the Find command to find construction geometry in the structure. Construction geometry entities retain their size when the camera zooms in or out. You can create the following construction geometries in 2D or 3D views:
View
Construction Geometry
3D view
Points, axes, planes, curves, coordinate systems, and lines
2D drawing view
Points, axes, and lines