You are looking at preliminary documentation for a future release. Not what you want? See the current release documentation.
If you have recently performed an operation that loads or parses custom, structured logs, you might need to refresh the index to make the fields available in Kibana. To refresh the index, use the refresh API. For example:
curl -XPOST 'http://localhost:9200/filebeat-2016.08.09/_refresh'
Intro to Kibana
ELK for Logs & Metrics