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prjemian · Jun 14, 2016 · 536315e · 536315e
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diff --git a/docs/source/index.rst b/docs/source/index.rst
@@ -21,6 +21,8 @@ Provides
 * :ref:`spec`              : library: python binding to read SPEC [#]_ data files
 * :ref:`prjPySpec`         : library: legacy version of **pySpec**, frozen at version 2014.0623.0
 * :ref:`eznx`              : library: (Easy NeXus) supports writing NeXus [#]_ HDF5 [#]_ files using h5py [#]_
+* :ref:`specplot`          : command-line tool: plot a SPEC scan to an image file
+* :ref:`specplot_gallery`  : command-line tool: call **specplot** for all scans in a list of files, makes a web gallery
 
 .. [#] http://certif.com
 .. [#] http://nexusformat.org

diff --git a/docs/source/install.rst b/docs/source/install.rst
@@ -66,9 +66,26 @@ To install in an alternate location::
 Required Libraries
 ##################
 
-========  =============================
-Library   URL
-========  =============================
-h5py      http://www.h5py.org
-numpy     http://numpy.scipy.org/
-========  =============================
+These libraries are required to write NeXus data files.
+They are not required to read SPEC data files.
+
+=============  =============================
+Library        URL
+=============  =============================
+h5py           http://www.h5py.org
+numpy          http://numpy.scipy.org/
+=============  =============================
+
+Optional Libraries
+##################
+
+These libraries are used by the :ref:`specplot <specplot>`
+and  :ref:`specplot_gallery <specplot_gallery>` modules
+of the *spec2nexus* package but are not required
+just to read SPEC data files or write NeXus data files.
+
+=============  =============================
+Library        URL
+=============  =============================
+MatPlotLib     http://matplotlib.org/
+=============  =============================