I am trying to edit elasticsearch.yml file on cloud.elastic but I'm unable to find a way to edit. Please kindly help me how to connect to cloud.elastic via an FTP application.
Elastic Cloud supports limited changes to the node config through the user interface. If you want to do something outside that you need to check with support. As it is a managed service you do not have direct access to the config, e.g. through FTP.
What is it you are looking to change?
I'm trying to modify the elasticsearch.yml to try the email alerts as mentioned here - https://www.elastic.co/guide/en/x-pack/6.2/actions-email.html#configuring-email
For that I would recommend contacting support.