It is possible to override the configuration of your Elasticsearch nodes via the Edit menu in the navigation panel on the left side under the Deployments. Elastic Cloud doesn't allow you to edit the elasticsearch.yml file directly. However, it provides a section called User Settings, which allows you to override a subset of the configuration parameters.

The configuration parameters that can be overridden are documented in the Elastic Cloud reference documentation at https://www.elastic.co/guide/en/cloud/current/ec-add-user-settings.html.