How do I make manual adjustments to an overtime hours balance, e.g. reduce it because the overtime hours will be compensated by a monetary payment?

Only HR can make a manual adjustment to an overtime hours balance. Go to the left sidebar and click on "HR Dashboard" > Click on "Absences" > Click on "Manage balances" > Select the employee > Click on the "Add" button at the bottom of the page > Select the year > In the "Balance" field, select "Compensation" > Enter the number of days to be deducted from the balance using a negative number (e.g. "-3") > Add a note.