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**To update a custom metric** The following ``update-custom-metric`` example updates a custom metric to have a new ``display-name``. :: aws iot update-custom-metric \ --metric-name batteryPercentage \ --display-name 'remaining battery percentage on device' \ --region us-east-1 Output:: { "metricName": "batteryPercentage", "metricArn": "arn:aws:iot:us-east-1:1234564789012:custommetric/batteryPercentage", "metricType": "number", "displayName": "remaining battery percentage on device", "creationDate": "2020-11-17T23:01:35.110000-08:00", "lastModifiedDate": "2020-11-17T23:02:12.879000-08:00" } For more information, see `Custom metrics <https://docs.aws.amazon.com/iot/latest/developerguide/dd-detect-custom-metrics.html>`__ in the *AWS IoT Core Developer Guide*.