The IGES Data dialog box allows you to click on a specific feature in the list box to display information about that feature's diameter, XYZ nominal, and so forth.
IGES Data dialog box
To view information about the CAD data that you're importing inside the IGES Data dialog box, follow this procedure:
Begin importing a CAD or IGES file (see "Importing an IGES File").
Once the IGES File dialog box appears, click Process to import the data.
Once the import is complete, click the Data button. The IGES Data dialog box appears.