(DOCSP-12945) show, hide, reposition legend (#431)

* (DOCSP-12945) show, hide, reposition legend

Author: zach-carr

source/customize-charts/general-customization.txt

@@ -50,6 +50,37 @@ This customization option is available for all charts *except*
 :ref:`Table <data-table-example>`, and
 :ref:`Word Cloud <word-cloud-example>` charts.
 
+Customize Legend
+----------------
+
+You can show or hide a chart legend. If you show the legend, you can 
+specify its position relative to your chart.
+
+To set this option:
+
+1. Navigate to the :guilabel:`Customization` tab in the
+   :doc:`Chart Builder </build-charts>`.
+
+#. In the :guilabel:`General Customization` section, set the 
+   :guilabel:`Legend` toggle switch to the desired setting. The 
+   legend is shown by default.
+
+#. If you toggle :guilabel:`Legend` on, you may select a position for 
+   the legend relative to the chart:
+
+   - Right
+   - Bottom
+   - Top
+
+   The legend is positioned to the right of the chart by default.
+
+Applicable Chart Types
+~~~~~~~~~~~~~~~~~~~~~~
+
+This customization option is available for all charts which may display 
+a legend. This includes any multi-series chart, as well as charts that 
+have a field mapped to a Color, Intensity, Shape or Size channel.
+
 .. _color-palette-customization:
 
 Color Palette Customization