As an Admin, you might want to promote multiple metrics from a report to 'Core' especially when validating a new dataset.
To add multiple metrics to the core list at once:
Go to 'Data Manager'
Click on the desired dataset
Click on the plus (+) icon at the end of the tab list to add the report containing the metrics you want to add to the core list
Click on 'Add Metrics to Core List'
Confirm your selected metrics and add them to the core list
