diff --git a/doc/Section_commands.html b/doc/Section_commands.html
index b1e8d9c9ba..bced8ce6d9 100644
--- a/doc/Section_commands.html
+++ b/doc/Section_commands.html
@@ -366,7 +366,7 @@ full description:
 <TR ALIGN="center"><TD ><A HREF = "pair_coul.html">coul/cut</A></TD><TD ><A HREF = "pair_coul.html">coul/debye</A></TD><TD ><A HREF = "pair_coul.html">coul/long</A></TD><TD ><A HREF = "pair_dipole.html">dipole/cut</A></TD></TR>
 <TR ALIGN="center"><TD ><A HREF = "pair_dpd.html">dpd</A></TD><TD ><A HREF = "pair_eam.html">eam</A></TD><TD ><A HREF = "pair_eam.html">eam/opt</A></TD><TD ><A HREF = "pair_eam.html">eam/alloy</A></TD></TR>
 <TR ALIGN="center"><TD ><A HREF = "pair_eam.html">eam/alloy/opt</A></TD><TD ><A HREF = "pair_eam.html">eam/fs</A></TD><TD ><A HREF = "pair_eam.html">eam/fs/opt</A></TD><TD ><A HREF = "pair_gayberne.html">gayberne</A></TD></TR>
-<TR ALIGN="center"><TD ><A HREF = "pair_gran_hertz_history.html">gran/hertz/history</A></TD><TD ><A HREF = "pair_gran_hooke.html">gran/hooke</A></TD><TD ><A HREF = "pair_gran_hooke_history.html">gran/hooke/history</A></TD><TD ><A HREF = "pair_charmm.html">lj/charmm/coul/charmm</A></TD></TR>
+<TR ALIGN="center"><TD ><A HREF = "pair_gran.html">gran/hertz/history</A></TD><TD ><A HREF = "pair_gran.html">gran/hooke</A></TD><TD ><A HREF = "pair_gran.html">gran/hooke/history</A></TD><TD ><A HREF = "pair_charmm.html">lj/charmm/coul/charmm</A></TD></TR>
 <TR ALIGN="center"><TD ><A HREF = "pair_charmm.html">lj/charmm/coul/charmm/implicit</A></TD><TD ><A HREF = "pair_charmm.html">lj/charmm/coul/long</A></TD><TD ><A HREF = "pair_charmm.html">lj/charmm/coul/long/opt</A></TD><TD ><A HREF = "pair_class2.html">lj/class2</A></TD></TR>
 <TR ALIGN="center"><TD ><A HREF = "pair_class2.html">lj/class2/coul/cut</A></TD><TD ><A HREF = "pair_class2.html">lj/class2/coul/long</A></TD><TD ><A HREF = "pair_lj.html">lj/cut</A></TD><TD ><A HREF = "pair_lj.html">lj/cut/opt</A></TD></TR>
 <TR ALIGN="center"><TD ><A HREF = "pair_lj.html">lj/cut/coul/cut</A></TD><TD ><A HREF = "pair_lj.html">lj/cut/coul/debye</A></TD><TD ><A HREF = "pair_lj.html">lj/cut/coul/long</A></TD><TD ><A HREF = "pair_lj.html">lj/cut/coul/long/tip4p</A></TD></TR>
diff --git a/doc/Section_commands.txt b/doc/Section_commands.txt
index 51f05590bd..a7f58bf584 100644
--- a/doc/Section_commands.txt
+++ b/doc/Section_commands.txt
@@ -506,9 +506,9 @@ full description:
 "eam/fs"_pair_eam.html,
 "eam/fs/opt"_pair_eam.html,
 "gayberne"_pair_gayberne.html,
-"gran/hertz/history"_pair_gran_hertz_history.html,
-"gran/hooke"_pair_gran_hooke.html,
-"gran/hooke/history"_pair_gran_hooke_history.html,
+"gran/hertz/history"_pair_gran.html,
+"gran/hooke"_pair_gran.html,
+"gran/hooke/history"_pair_gran.html,
 "lj/charmm/coul/charmm"_pair_charmm.html,
 "lj/charmm/coul/charmm/implicit"_pair_charmm.html,
 "lj/charmm/coul/long"_pair_charmm.html,
diff --git a/doc/fix_print.html b/doc/fix_print.html
index 7a8b597beb..d933f2c2c8 100644
--- a/doc/fix_print.html
+++ b/doc/fix_print.html
@@ -25,9 +25,10 @@
 
 <LI>zero or more keyword/value pairs may be appended 
 
-<LI>keyword = <I>file</I> or <I>screen</I> 
+<LI>keyword = <I>file</I> or <I>append</I> or <I>screen</I> 
 
 <PRE>  <I>file</I> value = filename
+  <I>append</I> value = filename
   <I>screen</I> value = <I>yes</I> or <I>no</I> 
 </PRE>
 
@@ -56,8 +57,11 @@ thermodynamic properties, global values calculated by a
 <A HREF = "compute.html">compute</A> or <A HREF = "fix.html">fix</A>, or references to other
 <A HREF = "variable.html">variables</A>.
 </P>
-<P>If the <I>file</I> keyword is used, a filename is specified to which the
-output generated by this fix will be written.
+<P>If the <I>file</I> or <I>append</I> keyword is used, a filename is specified to
+which the output generated by this fix will be written.  If <I>file</I> is
+used, then the filename is overwritten if it already exists.  If
+<I>append</I> is used, then the filename is appended to if it already
+exists, or created if it does not exist.
 </P>
 <P>If the <I>screen</I> keyword is used, output by this fix to the screen and
 logfile can be turned on or off as desired.
diff --git a/doc/fix_print.txt b/doc/fix_print.txt
index a8c4dd43c9..58b6e11964 100644
--- a/doc/fix_print.txt
+++ b/doc/fix_print.txt
@@ -17,8 +17,9 @@ print = style name of this fix command :l
 N = print every N steps :l
 string = text string to print with optional variable names :l
 zero or more keyword/value pairs may be appended :l
-keyword = {file} or {screen} :l
+keyword = {file} or {append} or {screen} :l
   {file} value = filename
+  {append} value = filename
   {screen} value = {yes} or {no} :pre
 :ule
 
@@ -46,8 +47,11 @@ thermodynamic properties, global values calculated by a
 "compute"_compute.html or "fix"_fix.html, or references to other
 "variables"_variable.html.
 
-If the {file} keyword is used, a filename is specified to which the
-output generated by this fix will be written.
+If the {file} or {append} keyword is used, a filename is specified to
+which the output generated by this fix will be written.  If {file} is
+used, then the filename is overwritten if it already exists.  If
+{append} is used, then the filename is appended to if it already
+exists, or created if it does not exist.
 
 If the {screen} keyword is used, output by this fix to the screen and
 logfile can be turned on or off as desired.
diff --git a/doc/group.html b/doc/group.html
index 08f0b407db..bfa1a1bfa3 100644
--- a/doc/group.html
+++ b/doc/group.html
@@ -93,7 +93,8 @@ group.
 </P>
 <P><B>Related commands:</B>
 </P>
-<P>region, fix, velocity, dump, temperature
+<P><A HREF = "dump.html">dump</A>, <A HREF = "fix.html">fix</A>, <A HREF = "region.html">region</A>,
+<A HREF = "temperature.html">temperature</A>, <A HREF = "velocity.html">velocity</A>
 </P>
 <P><B>Default:</B>
 </P>
diff --git a/doc/group.txt b/doc/group.txt
index e6dec4ff23..a17ca4a2fb 100644
--- a/doc/group.txt
+++ b/doc/group.txt
@@ -88,7 +88,8 @@ There can be no more than 32 defined groups, including "all".
 
 [Related commands:]
 
-region, fix, velocity, dump, temperature
+"dump"_dump.html, "fix"_fix.html, "region"_region.html,
+"temperature"_temperature.html, "velocity"_velocity.html
 
 [Default:]