The Directories Panel
This panel allows you to specify the root directory for anonymous and guest users. (Real users see the real filesystem.) It also allows you to specify the password and shadow password files to be used. If no file is specified, the system file will be used by default.
In the screenshot, anonymous users see a filesystem rooted at /home/ftp/pub, while guest users have default access. Special ftp password files are used in place of the system files.