Does anyone have any document for How to read/ use OperSearch Discovery portal.

Can anyone provide a document or link on how to effectively navigate and interpret the logs in the OperSearch Discovery portal? Our client is using Ataccama PAAS. And sometimes we go to OperSearch Discovery for logs. I find challenging to understand. For instance, to locate runtime errors, I need to input "Kubernetes.container_name = runtime-server" in the filter section, followed by "error" in the search section. This will display any errors related to the runtime server. Otherwise, the log page appears to be quite intricate. Any help or link is very much appreciated.