diff --git a/doc/Section_tools.html b/doc/Section_tools.html
index 77dcbc5dd4..b0a1a969a4 100644
--- a/doc/Section_tools.html
+++ b/doc/Section_tools.html
@@ -275,13 +275,13 @@ examples directory within pymol_asphere for more information.
 </P>
 <HR>
 
-<H4><A NAME = "pythontools"></A>python tools 
+<H4><A NAME = "pythontools"></A>python tool 
 </H4>
 <P>The python sub-directory contains several Python scripts
 that perform common LAMMPS post-processing tasks, like
 </P>
 <UL><LI>extract thermodynamic info from a log file as columns of numbers
-<LI>plot two columns of thermodynamic info from a log file
+<LI>plot two columns of thermodynamic info from a log file using GnuPlot
 <LI>sort the snapshots in a dump file by atom ID
 <LI>convert dump files into XYZ, CFG, or PDB format for viz by other packages 
 </UL>
diff --git a/doc/Section_tools.txt b/doc/Section_tools.txt
index 8206e7cdff..2041bf071a 100644
--- a/doc/Section_tools.txt
+++ b/doc/Section_tools.txt
@@ -277,7 +277,7 @@ The python sub-directory contains several Python scripts
 that perform common LAMMPS post-processing tasks, like
 
 extract thermodynamic info from a log file as columns of numbers
-plot two columns of thermodynamic info from a log file
+plot two columns of thermodynamic info from a log file using GnuPlot
 sort the snapshots in a dump file by atom ID
 convert dump files into XYZ, CFG, or PDB format for viz by other packages :ul