# CAD Objects

2D drawings can be depicted using "CADD" (Computer Aided Design Document) objects in OpenBrIM. There are three methods for creating CAD documents in **OpenBrIM**:

The "**CADD**" object represents an empty 2D drawing document. Child elements of the "CADD" object, such as "CADDLine" and "CADDEllipse," can be used to define the elements of the drawing.

The "**CADDFrom3D**" object generates a 2D drawing automatically from 3D objects.

The "**CADDFromDoc**" object creates a 2D drawing from a document, currently supporting only PDF documents.