Displays the message preceding the current or last-read message
    when the last command issued was READ. When the last command
    issued was DIRECTORY, the BACK command displays the preceding
    screen of the directory listing.

    Format

      BACK

1  –  Qualifier

1.1    /EDIT

    Invokes a text editor. Unless you have selected a different
    editor by entering the SET EDITOR command, the DECTPU-based
    EVE editor is invoked. Use your editor to peruse the last read
    message. When you are done, enter the appropriate command to
    quit from your selected editor. If you decide to edit the message
    and want to keep a copy of the newly edited message, enter the
    appropriate command to exit (use the EXIT command in EVE) and
    supply a file name.

1.2    /PAGE

       /PAGE[=keyword]
       /NOPAGE (default)

    Controls the display of information on the screen.

    You can use the following keywords with the /PAGE qualifier:

    CLEAR_SCREEN   Clears the screen before each page is displayed.

    SCROLL         Displays information one line at a time.

    SAVE[=n]       Enables screen navigation of information, where n
                   is the number of pages to store.

    The /PAGE qualifier allows you to navigate through a maximum of 5
    screens containing up to 255 columns of information. When you use
    the /PAGE qualifier, you can use the following keys as well:

    Key Sequence              Description

    Up arrow (^  ), Ctrl/B    Scroll up one line.
    Down arrow (v  )          Scroll down one line.
    Left arrow (< - )         Scroll left one column.
    Right arrow (- > )        Scroll right one column.
    Find (E1)                 Specify a string to find where the
                              information is displayed.
    Insert Here (E2)          Scroll right one half screen.
    Remove (E3)               Scroll left one half screen.
    Select (E4)               Toggle 80/132 column mode.
    Prev Screen (E5)          Get the previous page of information.
    Next Screen (E6),         Get the next page of information.
    Return, Enter, Space
    F10, Ctrl/Z               Exit.
    Do (F16)                  Toggle the display to oldest/newest
                              page.
    Ctrl/W                    Refresh the display.