.. _`sec:customizing`:

=======================================
Customization: Adding Simple Extensions
=======================================

|PSIfour| has been designed to be easily extensible. There are several
customizations accessible to any user, no programming experience or
recompilation required.

* :ref:`sec:basisUserDefined`

.. toctree::
   :maxdepth: 2

   quickaddalias
   quickadddatabase

* <https://github.com/dgasmith/psi4numpy>`_