diff --git a/dev-docs/source/BatchWidget/Internals/ExtractSubtrees.rst b/dev-docs/source/BatchWidget/Internals/ExtractSubtrees.rst
index 854675d414087425da16931416b4ee64d0520a33..0b5e737f2b159ae32532591f09ab2b1f66462737 100644
--- a/dev-docs/source/BatchWidget/Internals/ExtractSubtrees.rst
+++ b/dev-docs/source/BatchWidget/Internals/ExtractSubtrees.rst
@@ -19,10 +19,27 @@ The algorithm used to perform this conversion makes a simplifying assumption tha
subtrees in the result share a common parent. If this assumption is untrue then the input set
is unsuitable and the algorithm will return an empty optional.
-.. image:: ../../images/subtree_fail.svg
+.. image:: ../../images/subtree_fail_shallow.svg
:align: center
:width: 800px
+The above example fails due to a *shallow* root, a root which has a depth *smaller* than the first
+root we encounter.
+
+.. image:: ../../images/subtree_fail_deep.svg
+ :align: center
+ :width: 800px
+
+This example fails due to a *deep* root, a root which has a depth *larger* than the first
+root we encounter.
+
+.. image:: ../../images/subtree_fail_parent.svg
+ :align: center
+ :width: 800px
+
+This example fails due to the fact that the parents of the subtree roots are not the same.
+
+These conditions are checked using the functions defined in :code:`Subtree.h`.
This algorithm is used by :doc:`../API/JobTreeView` in the :code:`selectedSubtrees` method which is
required to implement non-trivial copy and paste.
diff --git a/dev-docs/source/BatchWidget/Internals/FindSubtreeRoots.rst b/dev-docs/source/BatchWidget/Internals/FindSubtreeRoots.rst
index 911aa6c0edb46f5f1b25a53e7af1707b510ef5f5..a0b988c3647f61bf31f9f60e4844b82ca946f312 100644
--- a/dev-docs/source/BatchWidget/Internals/FindSubtreeRoots.rst
+++ b/dev-docs/source/BatchWidget/Internals/FindSubtreeRoots.rst
@@ -21,10 +21,27 @@ The algorithm used to perform this conversion makes a simplifying assumption tha
subtrees in the result share a common parent. If this assumption is untrue then the input set
is unsuitable and the algorithm will return an empty optional.
-.. image:: ../../images/subtree_fail.svg
+.. image:: ../../images/subtree_fail_shallow.svg
:align: center
:width: 800px
+The above example fails due to a *shallow* root, a root which has a depth *smaller* than the first
+root we encounter.
+
+.. image:: ../../images/subtree_fail_deep.svg
+ :align: center
+ :width: 800px
+
+This example fails due to a *deep* root, a root which has a depth *larger* than the first
+root we encounter.
+
+.. image:: ../../images/subtree_fail_parent.svg
+ :align: center
+ :width: 800px
+
+This example fails due to the fact that the parents of the subtree roots are not the same.
+
+These conditions are checked using the functions defined in :code:`Subtree.h`.
This algorithm is used by :doc:`../API/JobTreeView` in the :code:`selectedSubtreeRoots` method which is
required to implement non-trivial copy and paste.
diff --git a/dev-docs/source/BatchWidget/index.rst b/dev-docs/source/BatchWidget/index.rst
index 66aa8938a36401c4bcf620034d4cdaeb7ecb7d19..08af54865dfe7efe67b672eb18d94a23e52df69c 100644
--- a/dev-docs/source/BatchWidget/index.rst
+++ b/dev-docs/source/BatchWidget/index.rst
@@ -23,8 +23,8 @@ Internals Documentation
.. toctree::
:maxdepth: 1
- Internals/ExtractSubtrees
Internals/FindSubtreeRoots
+ Internals/ExtractSubtrees
Internals/StrictModelIndexing
Internals/QtStandardItemTreeModelAdapter
Internals/CellBasedViewProperties
diff --git a/dev-docs/source/images/subtree_fail.svg b/dev-docs/source/images/subtree_fail_deep.svg
similarity index 100%
rename from dev-docs/source/images/subtree_fail.svg
rename to dev-docs/source/images/subtree_fail_deep.svg
diff --git a/dev-docs/source/images/subtree_fail_parent.svg b/dev-docs/source/images/subtree_fail_parent.svg
new file mode 100644
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diff --git a/qt/widgets/common/test/Batch/FindSubtreeRootsTest.h b/qt/widgets/common/test/Batch/FindSubtreeRootsTest.h
index 86cfea2700dcf6aee186f8879e95d7aea7ea4515..0cde47770f8e22adec2ddda70f6d793a91ede611 100644
--- a/qt/widgets/common/test/Batch/FindSubtreeRootsTest.h
+++ b/qt/widgets/common/test/Batch/FindSubtreeRootsTest.h
@@ -218,8 +218,6 @@ public:
auto roots = findSubtreeRoots(region);
TS_ASSERT(!roots.is_initialized())
}
-
-
};
#endif // MANTID_MANTIDWIDGETS_FINDSUBTREEROOTS_H