Yes, a Standard Scorecard can be converted to a Non-Numeric Scorecard and vice versa. However, a Standard or Non-Numeric Scorecard can’t be converted into Success Rate Scorecard or the other way round.
The user should go to the Scorecard Settings via the 'More' dropdown.
Next user should enable or disable the option 'Display as Non-Numeric'
If enabling the option for converting a Standard Scorecard to a Non-Numeric Scorecard, there is an extra step: configuring the thresholds for the Non-Numeric Scorecard.