If you prefer to manually edit your configuration files, use the following syntax for this option:

indexname       index.html      (or another name)

The Name for Index File ^(indexname) option is used to change the name of each directory index page within the report directory and its subdirectories. This name is used both for the calendar of reports and for each individual epoch report. If the Name for Index File ^(indexname) option is not given, indexes are named index.html or index.htm (the latter for DOS and related operating systems).