diff --git a/docs/sphinx/index.rst b/docs/sphinx/index.rst
index 351651f..e73b854 100644
--- a/docs/sphinx/index.rst
+++ b/docs/sphinx/index.rst
@@ -28,8 +28,8 @@ nutree
 
    $ pip install nutree
 
-**Note:** Run ``pip install nutree[graph]`` instead, in order to install 
-additional graph support.
+**Note:** Run ``pip install "nutree[graph]"`` or ``pip install "nutree[all]"`` 
+instead, in order to install additional graph support.
 
 ::
 
diff --git a/docs/sphinx/installation.rst b/docs/sphinx/installation.rst
index 61d0120..b37cd23 100644
--- a/docs/sphinx/installation.rst
+++ b/docs/sphinx/installation.rst
@@ -5,8 +5,8 @@ Installation is straightforward::
 
   $ pip install nutree
 
-**Note:** Run ``pip install nutree[graph]`` instead, in order to install 
-additional graph support.
+**Note:** Run ``pip install "nutree[graph]"`` or ``pip install "nutree[all]"`` 
+instead, in order to install additional graph support.
 
 Installing `nutree` and its dependencies into a 'sandbox' will help to keep
 your system Python clean, but requires to activate the virtual environment::
diff --git a/docs/sphinx/ug_graphs.rst b/docs/sphinx/ug_graphs.rst
index 2330b76..27fbd7d 100644
--- a/docs/sphinx/ug_graphs.rst
+++ b/docs/sphinx/ug_graphs.rst
@@ -175,7 +175,7 @@ Let's visualize the result of the :ref:`diff-and-merge` example::
     of `pydot <https://github.com/pydot/pydot>`_ 
     and `Graphwiz <https://www.graphviz.org>`_. |br|
     Either install them separately or install nutree with extras: 
-    ``pip install nutree[graph]``.
+    ``pip install "nutree[graph]"`` or ``pip install "nutree[all]"``.
 
 .. _save-mermaid:
 
@@ -461,5 +461,5 @@ This would be the 'turtle' formatted serialization::
 
 .. note::
     Converting to RDF requires an installation of `rdflib <https://rdflib.readthedocs.io/>`_ |br|
-    Either install it separately or install nutree with extras: 
-    ``pip install nutree[graph]``.
+    Either install them separately or install nutree with extras: 
+    ``pip install "nutree[graph]"`` or ``pip install "nutree[all]"``.
diff --git a/docs/sphinx/ug_randomize.rst b/docs/sphinx/ug_randomize.rst
index d0d6260..e52daf2 100644
--- a/docs/sphinx/ug_randomize.rst
+++ b/docs/sphinx/ug_randomize.rst
@@ -170,3 +170,5 @@ May produce::
     library and can use any of its providers to generate random data. |br|
     Make sure to install the `fabulist` package to use the text randomizers
     :class:`~tree_generator.TextRandomizer` and :class:`~tree_generator.BlindTextRandomizer`.
+    Either install `fabulist` separately or install nutree with extras: 
+    ``pip install "nutree[random]"`` or ``pip install "nutree[all]"``.
diff --git a/setup.cfg b/setup.cfg
index 44abd57..664ebe8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -102,27 +102,3 @@ universal = false
 # ignore =
 #     docs/sphinx-build
 #     docs/sphinx-build/*
-
-# # --- Coverage Settings --------------------------------------------------------
-
-# [coverage:run]
-# # branch = True
-# omit =
-#     tests/*
-#     # nutree/leaves_cli.py
-#     # nutree/cli_common.py
-#     # nutree/monitor/*
-
-# [coverage:report]
-# precision = 1
-# # show_missing = True
-# sort = Name
-# exclude_lines =
-#     pragma: no cover
-#     raise NotImplementedError
-#     if __name__ == .__main__.:
-#     if TYPE_CHECKING: 
-
-# [coverage:html]
-# directory = build/coverage
-