DOC: offset_threshold in whats_new and dflt_style_changes

Author: efiring

doc/users/dflt_style_changes.rst

@@ -1065,6 +1065,17 @@ Z-order
 
 
 
+``ScalarFormatter`` tick label formatting with offsets
+======================================================
+
+With the default of ``rcParams['axes.formatter.useoffset'] = True``,
+an offset will be used when it will save 4 or more digits.  This can
+be controlled with the new rcParam, ``axes.formatter.offset_threshold``.
+To restore the previous behavior of using an offset to save 2 or more
+digits, use ``rcParams['axes.formatter.offset_threshold'] = 2``.
+
+
+
 ``AutoDateFormatter`` format strings
 ====================================
 

doc/users/whats_new.rst

@@ -82,13 +82,16 @@ New rcparams added
 |`ytick.minor.right`,             |                                                  |
 |`ytick.major.right`              |                                                  |
 +---------------------------------+--------------------------------------------------+
-|`hist.bins`                      | the default number of bins to use in             |
+|`hist.bins`                      | The default number of bins to use in             |
 |                                 | `~matplotlib.axes.Axes.hist`.  This can be an    |
 |                                 | `int`, a list of floats, or ``'auto'`` if numpy  |
 |                                 | >= 1.11 is installed.                            |
 +---------------------------------+--------------------------------------------------+
-|`lines.scale_dashes`             | If the line dash patterns should scale with      |
-|                                 | linewidth                                        |
+|`lines.scale_dashes`             | Whether the line dash patterns should scale with |
+|                                 | linewidth.                                       |
++---------------------------------+--------------------------------------------------+
+|`axes.formatter.offset_threshold`| Minimum number of digits saved in tick labels    |
+|                                 | that triggers using an offset.                   |
 +---------------------------------+--------------------------------------------------+