The new Atlas Search view allows management of MongoBD indexes. Now, you can list, update, and delete existing indexes, and create new ones. Each index in a list can be expanded to reveal a read-only JSON editor displaying its configuration. The Atlas Search Index configuration is defined and managed using a JSON-based definition. The JSON editor supports Undo/Redo actions, Format (auto-formatting JSON), and Copy content.
For general information, refer to MongoDB Search Overview – Atlas – MongoDB Docs.
For more information on Collections and the views of Details, Indexes, and Atlas Search, refer to Collections user guide.