All settings for the use of an Index Feature Class are made in the folder General of the xml configuration file. These attributes are optional.

•IndexFC: Name of the FeatureClass that contains the index objects (polygons).
•IndexOutputDir: For each object of the Index FeatureClass an output file is created. The export files are stored in the directory that is configured under IndexOutputDir.
•IndexMode:
SELECT: Selection of all the features that are cut by the index geometry and the center of which lies within or directly on the index geometry.
CUT: All the features (polygons, lines) are cut to the index geometry.