(calc.info)Invocation Macros

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19.3 Invocation Macros
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Calc provides one special keyboard macro, called up by `M-# z'
(`calc-user-invocation'), that is intended to allow you to define your
own special way of starting Calc.  To define this "invocation macro,"
create the macro in the usual way with `C-x (' and `C-x )', then type
`Z I' (`calc-user-define-invocation').  There is only one invocation
macro, so you don't need to type any additional letters after `Z I'.
From now on, you can type `M-# z' at any time to execute your
invocation macro.

   For example, suppose you find yourself often grabbing rectangles of
numbers into Calc and multiplying their columns.  You can do this by
typing `M-# r' to grab, and `V R : *' to multiply columns.  To make
this into an invocation macro, just type `C-x ( M-# r V R : * C-x )',
then `Z I'.  Then, to multiply a rectangle of data, just mark the data
in its buffer in the usual way and type `M-# z'.

   Invocation macros are treated like regular Emacs keyboard macros;
all the special features described above for `Z K'-style macros do not
apply.  `M-# z' is just like `C-x e', except that it uses the macro
that was last stored by `Z I'.  (In fact, the macro does not even have
to have anything to do with Calc!)

   The `m m' command saves the last invocation macro defined by `Z I'
along with all the other Calc mode settings.  Note: General Mode
Commands.