Specification
Lists the specifications available for use in the currently-selected specification.
Unit system
Specifies the unit of measure for each specification in the Specification list.
OK
Accepts the selected specification for use in the model.
Select a specification from the Specification list, and then click OK.
To change any of the specifications listed, you must open the PRJ file that you have
selected in the CADWorx Specification Editor. This can be done by clicking Editor 
. For more information, see Editor.