I too find Grafana a bit mysterious. However, if you edit the graph, under the Query tab you will see “SELECT” followed by your field (eg. field(value)) and then a “+”. If you click on the “+”, the first option is “Aggregations”, and under there you will see count, sum, etc. This will generally replace whatever operator was already there (eg. mean()). In the “GROUP BY” section you can click on time() to change the aggregation interval.