.. _Passive_Tracers:

======================================
Passive and Other User-defined Tracers
======================================


.. _Passive_Tracers_1Passive_tracers:

Passive Tracers
===============

.. _Passive_Tracers_1Generic_tracers:

Generic Tracers
===============

.. _Passive_Tracers_1User_tracers:

User-defined Tracers
====================