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-rw-r--r--Docs/source/running_cpp/parameters.rst7
1 files changed, 5 insertions, 2 deletions
diff --git a/Docs/source/running_cpp/parameters.rst b/Docs/source/running_cpp/parameters.rst
index 2b3ddd87d..7805155ce 100644
--- a/Docs/source/running_cpp/parameters.rst
+++ b/Docs/source/running_cpp/parameters.rst
@@ -1432,13 +1432,16 @@ s disabled.
Which species dumped in this diagnostics.
* ``<diag_name>.<species_name>.variables`` (list of `strings` separated by spaces, optional)
- List of particle quantities to write to output file.
- By defaults, all quantities are written to file. Choices are
+ List of particle quantities or species-specific field quantities to write to output file.
+ Choices are
* ``w`` for the particle weight,
* ``ux`` ``uy`` ``uz`` for the particle momentum,
+ * ``rho`` to dump the charge density of the particles belonging to species ``<species_name>``.
+
+ By defaults, all quantities are written to output file, except the charge density.
The particle positions are always included.
Use ``<species>.variables = none`` to plot no particle data, except particle position.