If you are adding score entries manually into your rise.global scorecard, either manually (i.e. directly into your scorecard using the "add data entries" or via csv import), you may need to add new metrics to your scorecard from time to time.
To do so, go to the Score Algorithm page (under Scorecard Settings)
Click on +Add Metric. This will add "New Metric" on your score algorithm metric tree. If you click on the "New Metric" name and then choose "edit metric", you will then be able to edit the properties of the metric (e.g. it's name, its format, its score method).