File Filter Entry Box in the Options File Window

  If you modify the file extension in the Filter entry box, a
  list of files with the desired file extension will appear in the
  Files list box.  If there are no files which match the file filter
  specification, no files will appear in the list box.

  Additional topics:

  *   Overview of the CDA Viewer

  *   File Menu

  *   Options File Button in the Open Window

  *   OK Button in the Options File Window