The IDF 2.0 and 3.0 export option allows you to export your designs into your mechanical CAD system using the industry standard IDF format.
The IDF option exports two files for both format types. These two files define the board outline and component positions, and the component boundary, height, units and part name.
Version 3.0 of IDF also supports the mounting offset of the component above the PCB itself. This would be used if the component requires a socket or special mounting feature to be defined and allowed for when showing its true height. This value would be in addition to the component height value defined.