Syntax: MACRO EDIT name
or      MACRO name [narg] { macro }
or      MACRO name [narg] < macro >
or      MACRO name #1 #2
or      MACRO name DELETE
or      MACRO READ file
or      MACRO DELETE file
or      MACRO WRITE file
or      MACRO WRITE name [+] file
or      LIST MACRO [begin end]

   MACRO EDIT name allows you to edit a macro. All the commands
available to the history editor are available (including the
^history), except ^M inserts a line after the cursor (breaking the
line if not at the end), and ^N and ^P get the next and previous lines
respectively. To exit use ^X. The macro need not exist, and both its
name and number of arguments can be changed by editing the zeroth line
of the macro. The keybindings may be changed with READ EDIT.

   MACRO name [narg] { macro } defines `name' to be `macro', where
name is a single word, and macro may be anything. Macro is invoked by
typing its name.  The optional `nargs' is the number of arguments the
macro expects, default 0.  If the macro's body is defined to be
"delete", the macro is deleted (MACRO name DELETE also deletes a
macro).  Arguments are referred to as $1, $2, ... $n, up to a maximum
of $9. The name of the macro is in $0. If the number of arguments is
greater than 9, it is taken to be variable, up to the number modulo 10
(e.g. 12 means 0, 1, or 2 arguments). If it is greater than 99 the
last argument extends to the end of the line.

   MACRO name #1 #2 defines macro name to consist of lines #1 - #2 of
the history buffer.  If #1 or #2 is negative it is interpreted
relative to the current command, so saying "MACRO last2 -1 -2" will
define a macro `last2' consisting of the last 2 commands issued.

   MACRO READ FILE, reads and defines all the macros in file FILE.

   MACRO DELETE FILE has the effect of deleting all of the macros
defined in FILE.

   MACRO WRITE FILE writes all currently defined macros to file FILE
in alphabetical order.

   MACRO WRITE NAME FILE writes the macro NAME to file FILE. If the
file is the same as for the previous use of this command, or the
optional `+' is specified, the macro is written to the bottom of the
file, otherwise the file is created.

   LIST MACRO lists all currently defined macros, or all those which
are between begin and end alphabetically (asciily).