diff --git a/doc/dump.html b/doc/dump.html
index fcab28e210..fad0888e9a 100644
--- a/doc/dump.html
+++ b/doc/dump.html
@@ -208,7 +208,7 @@ be cut and pasted directly into a data file read by the
 extended CFG format files, as used by the
 <A HREF = "http://mt.seas.upenn.edu/Archive/Graphics/A">AtomEye</A> visualization
 package.  Since the extended CFG format uses a single snapshot of the
-system per file, a wild-card "*" must be included in the filename, as
+system per file, a wildcard "*" must be included in the filename, as
 discussed below.  The list of atom attributes for style <I>cfg</I> must
 begin with "id type xs ys zs", since these quantities are needed to
 write the CFG files in the appropriate format (though the "id" and
@@ -276,7 +276,7 @@ dump command is invoked and closed when an <A HREF = "undump.html">undump</A>
 command is used or when LAMMPS exits.  For the <I>dcd</I> and <I>xtc</I> styles,
 this is a single large binary file.
 </P>
-<P>Dump filenames can contain two wild-card characters.  If a "*"
+<P>Dump filenames can contain two wildcard characters.  If a "*"
 character appears in the filename, then one file per snapshot is
 written and the "*" character is replaced with the timestep value.
 For example, tmp.dump.* becomes tmp.dump.0, tmp.dump.10000,
diff --git a/doc/dump_modify.html b/doc/dump_modify.html
index a13295d400..21f0943757 100644
--- a/doc/dump_modify.html
+++ b/doc/dump_modify.html
@@ -33,6 +33,7 @@
   <I>image</I> arg = <I>yes</I> or <I>no</I>
   <I>label</I> arg = string
     string = character string (e.g. BONDS) to use in header of dump local file
+  <I>pad</I> arg = Nchar = # of characters to convert timestep to
   <I>precision</I> arg = power-of-10 value from 10 to 1000000
   <I>region</I> arg = region-ID or "none"
   <I>scale</I> arg = <I>yes</I> or <I>no</I>
@@ -153,6 +154,16 @@ ITEM: ENTRIES ...
 <P>The word "ENTRIES" will be replaced with the string specified,
 e.g. BONDS or ANGLES.
 </P>
+<P>The <I>pad</I> keyword only applies when the dump filename is specified
+with a wildcard "*" character which becomes the timestep.  If <I>pad</I> is
+0, which is the default, the timestep is converted into a string of
+unpadded length, e.g. 100 or 12000 or 2000000.  When <I>pad</I> is
+specified with <I>Nchar</I> > 0, the string is padded with leading zeroes
+so they are all the same length = <I>Nchar</I>.  For example, pad 7 would
+yield 0000100, 0012000, 2000000.  This can be useful so that
+post-processing programs can easily read the files in ascending
+timestep order.
+</P>
 <P>The <I>precision</I> keyword only applies to the dump <I>xtc</I> style.  A
 specified value of N means that coordinates are stored to 1/N
 nanometer accuracy, e.g. for N = 1000, the coordinates are written to
@@ -227,6 +238,7 @@ box size stored with the snapshot.
 <LI>format = %d and %g for each integer or floating point value
 <LI>image = no
 <LI>label = ENTRIES
+<LI>pad = 0
 <LI>precision = 1000
 <LI>region = none
 <LI>scale = yes