Add explanation linking to previous behavior.

HHest · web-flow · commit 50a969564e87 · 2018-01-30T08:49:22.000+01:00
diff --git a/doc/users/next_whats_new/2018_01_25_scale_axis_by_factor.rst b/doc/users/next_whats_new/2018_01_25_scale_axis_by_factor.rst
@@ -1,6 +1,10 @@
 Ability to scale axis by a fixed order of magnitude
 ---------------------------------------------------
 
-To scale an axis by a fixed order of magnitude, set the *scilimits* argument of 
-``Axes.ticklabel_format`` to the same (non-zero) lower and upper limits. Say to scale 
+To scale an axis by a fixed order of magnitude, set the *scilimits* argument of
+``Axes.ticklabel_format`` to the same (non-zero) lower and upper limits. Say to scale
 the y axis by a million (1e6), use ``ax.ticklabel_format(style='sci', scilimits=(6, 6), axis='y')``.
+
+The behavior of ``scilimits=(0, 0)`` is unchanged. With this setting, matplotlib will adjust
+the order of magnitude depending on the y values, rather than keeping it fixed. Previously, setting
+``scilimits=(m, m)`` was equivalent to setting ``scilimits=(0, 0)``.
