Options - Select the desired value from the drop-down list to the right of the option
Pre-Process IGES - Selecting the checkbox allows for a temporary override for pre-processing of IGES files.
Note: Pre-Process IGES is only shown when CAD Options is opened from the import CAD dialog while IGES is selected CAD type.
Defaults - This will set default values for the current CAD type.
OK - This will save changes for the current CAD type and close the dialog.
Cancel - This will discard the changes and close the dialog.