1  Operation
   You interact with the Edit/FDL utility by answering questions
   that control the execution of the editor and determine the values
   of variables. These variables may be used in calculating various
   file parameters or indirectly setting FDL attribute values. You
   terminate your answers by pressing the Return key. Additionally,
   there are a number of special characters which are significant to
   the Edit/FDL utility.
 

2  Files
   The Edit/FDL utility produces a new version of the input FDL file
   as its output file unless you explicitly specify a different
   output file using the /OUTPUT=file-spec qualifier with the
   EDIT/FDL command. Unlike the input FDL file, which may or may
   not be found, any Analysis file which is specified (with the
   /ANALYSIS=file-spec qualifier) must be found or the Edit/FDL
   utility terminates.
 

2  Prompt-level
   The prompt-level of the Edit/FDL utility depends upon whether an
   OpenVMS-supported video terminal is being used or not. If your
   terminal is, in fact, a terminal which is supported by OpenVMS
   systems, verify that the terminal driver supports it using the
   DCL command SET TERMINAL/INQUIRE.

   On foreign, slow baud rate, or hardcopy terminals, the default
   mode of the Edit/FDL utility is BRIEF. On terminals running at a
   speed of 2400 baud or greater which are classified as "Video" by
   the SHOW TERMINAL DCL command, the default mode is FULL.

   Refer to the OpenVMS DCL Dictionary for complete information
   about SHOW TERMINAL and SET TERMINAL.

   The special character "?" can be used to retrieve more
   information (or possibly display a Menu) about any particular
   question.

   The prompt-level of an editing session can be set with the
   /PROMPT qualifier on the DCL EDIT/FDL command.
 

2  Question-format
   Every question that the Edit/FDL utility asks has the same
   structure. (The exception to this rule is the Help-topic prompt
   you see while in the Help Function. The structure is:

     Question-text         (answer-range)[default-answer]    : your-answer

   Some questions require you to choose among several keyword
   options. These options are listed either in the accompanying
   menu (if present) or in an option list, which is enclosed by
   parentheses, such as below:

     (Option1 Option2 Option3 ...)
     Question-text         (Keyword)[default-answer]         : your-answer

   The (:)  may be placed on the next line to allow for long-string
   answers. A "2Giga" in an (answer-range) stands for the maximum
   allowable signed 32-bit integer. An "Abs" in an (answer-range)
   means Absolute value. A [default-answer] of [-] means that there
   is no default.
 

2  Control_Characters
   Ctrl/Z may be used to exit the Edit/FDL utility if you are
   currently at the main level. At lower levels, Ctrl/Z returns
   you to the main level.

   You can use Ctrl/C to exit from the Edit/FDL utility at any
   time. Avoid using Ctrl/Y to abort the Edit/FDL utility because
   that may leave the scrolling region of a DEC_CRT terminal in an
   undetermined state. If this happens, use the DCL EXIT command
   to restore the terminal to its original state. This action is
   unnecessary if the next DCL command issued invokes a new image.

   To get more information about any particular question, type "?"
   and press the Return key. When an invalid response is made to one
   of the FDL Editor's questions, the action taken is equivalent to
   the ? command.