MAIN DIRECTORY SCREEN HELP
  Within the MAIN directory screen, you may peruse the file list of the
  directory indicated at the bottom with the [UP] [DN] [PGUP] [PGDN]
  [HOME] and [END] keys.  They function just as you would expect.  The
  [LEFT] and [RIGHT] arrows will search for the next file matching the
  highlight extension (defined in ARKSETUP or the MAIN MENU) within the
  directory, stopping when you press a key or it finds a file.  Marking
  files for later action (e.g. zipping, copying etc.) is done with the
  [+] [ENTER] [SPACE] and [-] keys.  All but the [-] key will mark the
  file at the highlight bar and roll down to the next filename.  The [-]
  key is special because it causes the highlight bar to roll upward after
  marking the file at the highlight bar.  The marks will toggle OFF if
  marking is attempted twice.  The F3-F5 keys handle marking all, clearing
  all marks, and toggling marks.  Toggling marks (3 levels below active)
  helps you keep track of what files you have already worked with.  See the
  help screen on MARKING or the documentation for details.  The STATUS
  box on the lower right provides information concerning the files you have
  marked, including bytes marked, number of files, etc.  It is a very
  good habit to watch that box, as NOAH attempts to retain marks when you
  change the default directory or drive.  When in doubt, toggle and check
  using F5.  Pressing F2 accesses all other handling functions in NOAH 2.5Z,
  and the MAIN menu has a help box at the bottom right clearly identifying
  the function of each menu selection.  Substitute "=" and "\" for F11 & F12
  if they are not present/supported on your keyboard.
