Let's assume you would like the effective rate to be 60% of the base rate. Then, you should make the following configuration selection:
Select the margin type value percentage of the base rate that is subtracted from the base rate,
Set the default margin rate value to 40% (100% - 40% = 60%).
Minimum and maximum margin rates act as boundaries for manual adjustments to the effective rate of one particular account. Let's assume you want to restrict the manual adjustment of the effective rate to a maximum of 80% and a minimum of 40% of the base rate. Then, you should set:
Min margin rate to 20% (100% - 80% = 20%),
Max margin rate to 60% (100% - 60% = 40%).
The feature to manually adjust the account's floating interest rate margin will be available in future releases.