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-rw-r--r--Docs/source/running_cpp/parameters.rst8
1 files changed, 7 insertions, 1 deletions
diff --git a/Docs/source/running_cpp/parameters.rst b/Docs/source/running_cpp/parameters.rst
index c32f1637f..311b9fe0c 100644
--- a/Docs/source/running_cpp/parameters.rst
+++ b/Docs/source/running_cpp/parameters.rst
@@ -701,7 +701,13 @@ Diagnostics and output
`openPMD <https://github.com/openPMD>`__ format.
When WarpX is compiled with openPMD support, this is ``1`` by default.
-* ``warpx.do_boosted_frame_diagnostic`` (`0 or 1`)
+* ``warpx.openpmd_backend`` (``h5``, ``bp`` or ``json``) optional
+ I/O backend for
+ `openPMD <https://github.com/openPMD>`__ dumps.
+ When WarpX is compiled with openPMD support, this is ``h5`` by default.
+ ``json`` only works with serial/single-rank jobs.
+
+* ``warpx.do_boosted_frame_diagnostic`` (`0` or `1`)
Whether to use the **back-transformed diagnostics** (i.e. diagnostics that
perform on-the-fly conversion to the laboratory frame, when running
boosted-frame simulations)