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<liclass="toctree-l2"><aclass="reference internal" href="devel/add_new_projection.html">Developer's guide for creating scales and transformations</a></li>
<liclass="toctree-l2"><aclass="reference internal" href="devel/portable_code.html">Developer's tips for writing code for Python 2 and 3</a></li>
<liclass="toctree-l2"><aclass="reference internal" href="devel/gitwash/index.html">Working with <em>Matplotlib</em> source code</a></li>