improve screenshot; add downsample graphic

Author: kilfoyle

manage-data/images/elasticsearch-reference-create-policy-downsample.png

@@ -65,7 +65,11 @@ To add an ILM policy to an {{es}} cluster:
     The rollover action implicitly always rolls over a data stream or alias if one or more shards contain 200000000 or more documents. Normally a shard will reach 25GB long before it reaches 200M documents, but this isn’t the case for space efficient data sets. Search performance will very likely suffer if a shard contains more than 200M documents. This is the reason for the built-in limit.
     ::::
 
-1. By default, only the "hot" index lifecycle phase is enabled. Enable each additional lifecycle phase that you'd like, and for each choose any [index lifecycle actions](elasticsearch://reference/elasticsearch/index-lifecycle-actions/index.md) to perform on indices when they enter that phase. For example, you could choose the action to [downsample](/manage-data/data-store/data-streams/downsampling-time-series-data-stream.md) the index, which aggregates the time series data into statistical summaries, effectively reducing the data footprint.
+1. By default, only the "hot" index lifecycle phase is enabled. Enable each additional lifecycle phase that you'd like, and for each choose any [index lifecycle actions](elasticsearch://reference/elasticsearch/index-lifecycle-actions/index.md) to perform on indices when they enter that phase.
+
+    For example, you could choose the action to [downsample](/manage-data/data-store/data-streams/downsampling-time-series-data-stream.md) the index, which aggregates the time series data into statistical summaries, reducing the data storage size.
+
+    ![Create policy page](/manage-data/images/elasticsearch-reference-create-policy-downsample.png "")
 
     Note that for each phase after the "hot" phase you have the option to move the data into the phase after a certain duration of time. This duration is calculated from the time of the index rollover and not from the time the index is created.