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    The "Filter" box provides a selection of file types to viewed in the "File List Box"

All Web Documents: Shows files with "txt", "htm", "html", "css", "jpg", "gif" and "png" extensions.
All HTML files: Shows files with "htm", "html" and "css" extensions.
All Images: Shows files with "jpg", "gif" and "png" extensions.
All Files: Shows all files in selected directory.