The JT file format is a 3D mesh format that supports primitive shapes such as slabs, cylinders, cones, and spheres. You can import and export JT files so that you can collaborate with other software packages that support the JT file format. You can do the following with JT files:

• Attach them as references
• Place them as cells
• Open them in read-only mode
• Open and save them as DGN files