diff --git a/doc/src/dump_modify.txt b/doc/src/dump_modify.txt
index b5daa6416e..2ea1da3db3 100644
--- a/doc/src/dump_modify.txt
+++ b/doc/src/dump_modify.txt
@@ -16,7 +16,8 @@ dump-ID = ID of dump to modify :ulb,l
 one or more keyword/value pairs may be appended :l
 these keywords apply to various dump styles :l
 keyword = {append} or {buffer} or {element} or {every} or {fileper} or {first} or {flush} or {format} or {image} or {label} or {nfile} or {pad} or {precision} or {region} or {scale} or {sort} or {thresh} or {unwrap} :l
-  {append} arg = {yes} or {no}
+  {append} arg = {yes} or {no} or {at} N
+    N = index of frame written upon first dump
   {buffer} arg = {yes} or {no}
   {element} args = E1 E2 ... EN, where N = # of atom types
     E1,...,EN = element name, e.g. C or Fe or Ga
@@ -41,6 +42,7 @@ keyword = {append} or {buffer} or {element} or {every} or {fileper} or {first} o
   {region} arg = region-ID or "none"
   {scale} arg = {yes} or {no}
   {sfactor} arg = coordinate scaling factor (> 0.0)
+  {thermo} arg = {yes} or {no}
   {tfactor} arg = time scaling factor (> 0.0)
   {sort} arg = {off} or {id} or N or -N
      off = no sorting of per-atom lines within a snapshot
@@ -139,12 +141,13 @@ and {dcd}.  It also applies only to text output files, not to binary
 or gzipped or image/movie files.  If specified as {yes}, then dump
 snapshots are appended to the end of an existing dump file.  If
 specified as {no}, then a new dump file will be created which will
-overwrite an existing file with the same name.  This keyword can only
-take effect if the dump_modify command is used after the
-"dump"_dump.html command, but before the first command that causes
-dump snapshots to be output, e.g. a "run"_run.html or
-"minimize"_minimize.html command.  Once the dump file has been opened,
-this keyword has no further effect.
+overwrite an existing file with the same name.  If the {at} option is present
+({netcdf} only), then the frame to append to can be specified.  Negative values
+are counted from the end of the file.  This keyword can only take effect if the
+dump_modify command is used after the "dump"_dump.html command, but before the
+first command that causes dump snapshots to be output, e.g. a "run"_run.html or
+"minimize"_minimize.html command.  Once the dump file has been opened, this
+keyword has no further effect.
 
 :line
 
@@ -413,6 +416,13 @@ most effective when the typical magnitude of position data is between
 
 :line
 
+The {thermo} keyword ({netcdf} only) triggers writing of "thermo"_thermo.html
+information to the dump file alongside per-atom data. The data included in the
+dump file is identical to the data specified by
+"thermo_style"_thermo_style.html.
+
+:line
+
 The {region} keyword only applies to the dump {custom}, {cfg},
 {image}, and {movie} styles.  If specified, only atoms in the region
 will be written to the dump file or included in the image/movie.  Only
diff --git a/doc/src/dump_netcdf.txt b/doc/src/dump_netcdf.txt
index 4e82656698..63568137a6 100644
--- a/doc/src/dump_netcdf.txt
+++ b/doc/src/dump_netcdf.txt
@@ -24,7 +24,7 @@ args = list of atom attributes, same as for "dump_style custom"_dump.html :l,ule
 [Examples:]
 
 dump 1 all netcdf 100 traj.nc type x y z vx vy vz
-dump_modify 1 append yes at -1 global c_thermo_pe c_thermo_temp c_thermo_press
+dump_modify 1 append yes at -1 thermo yes
 dump 1 all netcdf/mpiio 1000 traj.nc id type x y z :pre
 
 [Description:]
@@ -44,7 +44,7 @@ rank.
 NetCDF files can be directly visualized via the following tools:
 
 Ovito (http://www.ovito.org/). Ovito supports the AMBER convention and
-all of the above extensions. :ule,b
+all extensions of this dump style. :ule,b
 
 VMD (http://www.ks.uiuc.edu/Research/vmd/). :l
 
@@ -52,15 +52,9 @@ AtomEye (http://www.libatoms.org/). The libAtoms version of AtomEye
 contains a NetCDF reader that is not present in the standard
 distribution of AtomEye. :l,ule
 
-In addition to per-atom data, global data can be included in the dump
-file, which are the kinds of values output by the
-"thermo_style"_thermo_style.html command .  See "Section howto
-6.15"_Section_howto.html#howto_15 for an explanation of per-atom
-versus global data.  The global output written into the dump file can
-be from computes, fixes, or variables, by prefixing the compute/fix ID
-or variable name with "c_" or "f_" or "v_" respectively, as in the
-example above.  These global values are specified via the "dump_modify
-global"_dump_modify.html command.
+In addition to per-atom data, "thermo"_thermo.html data can be included in the
+dump file. The data included in the dump file is identical to the data specified
+by "thermo_style"_thermo_style.html.
 
 :link(netcdf-home,http://www.unidata.ucar.edu/software/netcdf/)
 :link(pnetcdf-home,http://trac.mcs.anl.gov/projects/parallel-netcdf/)