From 76e1bb89a34df8b19735025f04eb3676b161f6da Mon Sep 17 00:00:00 2001
From: Josh Borrow <joshua.borrow@durham.ac.uk>
Date: Fri, 9 Nov 2018 09:20:59 +0000
Subject: [PATCH] Minor documenation update for velociraptor output

---
 doc/RTD/source/VELOCIraptorInterface/output.rst | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/doc/RTD/source/VELOCIraptorInterface/output.rst b/doc/RTD/source/VELOCIraptorInterface/output.rst
index 5a7073da17..b903a65012 100644
--- a/doc/RTD/source/VELOCIraptorInterface/output.rst
+++ b/doc/RTD/source/VELOCIraptorInterface/output.rst
@@ -23,7 +23,10 @@ group sizes, the interesting data in the ``.catalog_group`` files are:
 
 + The ``group_size``: gives a list of all the halos and the number of particles
   in the halo, this list is numbered from 0 until the number of groups minus
-  one. It is important that the groups are not ordered in any way [#order]_ 
+  one. It is important that the groups are not ordered in any way [#order]_.
+  It is also important to note that the group size includes both the bound and
+  unbound particles; always use the ``Offset`` and ``Offset_unbound`` data
+  when reading from the ``catalog_particles`` files.
 + The ``Num_of_groups`` or ``Total_num_of_groups``: gives the total number of
   groups in the snapshot.
 + The ``Offset`` list: This list gives the offset off the particles. In the
-- 
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