+/- syntax and merging of multiple IndexOptions directives is only available with Apache 1.3. 3 and later; the FoldersFirst and DescriptionWidth options are only available with Apache 1.3. 10 and later; the TrackModified option is only available with Apache 1.3. 15 and later.

To turn on automatic directory indexing, find the Options directive that applies to the directory and add the Indexes keyword. To turn off automatic directory indexing, remove the Indexes keyword from the appropriate Options line.

The DirectoryIndex directive sets the list of resources to look for, when the client requests an index of the directory by specifying a / at the end of the directory name. Local-url is the (%-encoded) URL of a document on the server relative to the requested directory; it is usually the name of a file in the directory.

+FollowSymLinks makes Apache follow system symbolic links (shortcuts, if you would) in your file system. +Indexes allows access to open folders within your file system, e.g. if you forgot to put an index. {ext_here} file down within a directory, +Indexes would allow list that directory's contents to the user.