**** From the Maxima manual ****


'maxima-init.mac' is a file which is loaded automatically when Maxima starts.


You can use 'maxima-init.mac' to customize your Maxima environment.


'maxima-init.mac', if it exists, is typically placed in the directory named
by 'maxima_userdir', although it can be in any directory searched by the
function file_search.


Here is an example 'maxima-init.mac' file:

  setup_autoload ("specfun.mac", ultraspherical, assoc_legendre_p);
  showtime:all;

  In this example, setup_autoload tells Maxima to load the specified file
  (specfun.mac) if any of the functions (ultraspherical, assoc_legendre_p)
  are called but not yet defined.

Thus you needn't remember to load the le before calling the functions.
The statement showtime: 'all' tells Maxima to set the showtime variable.


The 'maximainit.mac' file can contain any other assignments or other Maxima
statements.