Proxy access means that the Grafana backend will proxy all requests from the browser, and send them on to the Data Source. This is useful because it can eliminate CORS (Cross Origin Site Resource) issues, as well as eliminate the need to disseminate authentication details to the Data Source to the browser.
Direct access is still supported because in some cases it may be useful to access a Data Source directly depending on the use case and topology of Grafana, the user, and the Data Source.
### Direct access
If you select direct access you must update your Elasticsearch configuration to allow other domains to access
Elasticsearch from the browser. You do this by specifying these to options in your **elasticsearch.yml** config file.
The Elasticsearch query editor allows you to select multiple metrics and group by multiple terms or filters. Use the plus and minus icons to the right to add / remove
metrics or group bys. Some metrics and group by have options, click the option text to expand the the row to view and edit metric or group by options.