On the Gift Types tab of the report:

 
     
    • Unmark the Exclude zero amount gifts checkbox if reporting on pledges that are paid or written off.
     
    • Mark the Include outstanding pledges only checkbox if reporting only on pledges that are not fully paid.
     
    • If reporting on the pledge as of a specific date and filtering on campaigns, funds, or appeals, mark the Calculate gift balance based on date range, campaign, fund or appeal checkbox.