update docs

doc/src/reset.rst

@@ -0,0 +1,46 @@
+.. index:: reset
+
+reset command
+=============
+
+Syntax
+""""""
+
+.. code-block:: LAMMPS
+
+   reset sub-command keyword values ...
+
+   * sub-command = *atom_ids* or *image_flags* or *mol_ids*
+   * zero or more keyword/value pairs may be appended depending on sub-command
+
+Examples
+""""""""
+
+.. code-block:: LAMMPS
+
+   reset atom_ids
+   reset image_flags all
+   reset mol_ids all
+
+Description
+"""""""""""
+
+.. versionadded:: TBD
+
+The *reset* command provides a number of sub-commands that reset
+selected atom properties like atom IDs, molecule IDs, or image flags
+according to selected algorithms.  Those are often useful when the
+simulated system has undergone some significant modifications like
+adding or removing atoms or molecules, joining data files, changing
+bonds, or diffusion.  Follow the links listed below to see the
+documentation for individual sub-commands.
+
+- :doc:`reset_atom_ids`
+- :doc:`reset_image_flags`
+- :doc:`reset_mol_ids`
+
+
+Defaults
+""""""""
+
+none

doc/src/reset_atom_ids.rst

@@ -28,6 +28,8 @@ Examples
 Description
 """""""""""
 
+.. versionchanged:: TBD
+
 Reset atom IDs for the system, including all the global IDs stored
 for bond, angle, dihedral, improper topology data.  This will
 create a set of IDs that are numbered contiguously from 1 to N

doc/src/reset_image_flags.rst

@@ -23,6 +23,8 @@ Examples
 Description
 """""""""""
 
+.. versionadded:: TBD
+
 Reset the image flags of atoms so that molecular fragments with atoms in
 different periodic images retain their geometry.  This avoids
 inconsistent image flags resulting from resetting them all to zero.

doc/src/reset_mol_ids.rst

@@ -33,6 +33,8 @@ Examples
 Description
 """""""""""
 
+.. versionchanged:: TBD
+
 Reset molecule IDs for a group of atoms based on current bond
 connectivity.  This will typically create a new set of molecule IDs
 for atoms in the group.  Only molecule IDs for atoms in the specified