How do I add a new manual metric to my scorecard?
To do so, go to the Score Algorithm page (under Scorecard Settings)
Then
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).