(DOCSP-12345): v1.18 release notes

Author: jeff-allen-mongo

source/release-notes.txt

@@ -10,6 +10,46 @@ MongoDB Charts Cloud Release Notes
    :depth: 1
    :class: twocols
 
+|charts| v1.18.0
+----------------
+
+*Released September 15, 2020*
+
+Improvements in this release:
+
+- Adds new :ref:`Top Item <top-item-ref>` chart type, allowing you to
+  see details of a single item from a collection.
+
+- Allows changing the size of text labels on a chart.
+
+- Adds new :guilabel:`Period` option on
+  :ref:`date filters <charts-filter-documents>`, allowing you to
+  filter by a current or previous period.
+
+- Allows sorting a chart on a specific series when the chart uses
+  multiple series generated from different fields.
+
+Bug fixes in this release:
+
+- Array reduction options no longer show on wrong cards after deleting
+  fields.
+
+- Improves performance of queries when absolute date filters are used.
+
+- Improves rendering of multi-series charts containing empty bins.
+
+- Embedded charts no longer blank out when refreshing.
+
+- Zoomed dashboard view now fills the entire screen.
+
+- Tables containing a mixture of unbinned dates and binned values no
+  longer show empty cells where dates should appear.
+
+- Improves rendering consistency across different chart types.
+
+- Charts no longer hang hang during rendering if the number of
+  requested bins was very large.
+
 |charts| v1.17.0
 ----------------