Add a Calculated Control This Report can calculate the number of days each movie is past due. Here are the steps.   6. Try it: Add a Calculated Control Go to Report Design Tools ->Design->Controls. Select a Control: Text Box. Click on the Detail Section to create the Control.   Now, Do This: Edit the Properties The Unbound Text Box is selected. Go to Property Sheet->All. Edit the Name: PastDue   Try This, Too: Edit the Control Source: Click on the Control Source (It is blank). Click on the three-dot builder to open the Expression Builder.   Select an Expression Element: rptOverdue. Select the Categories to create the expression: =[DaysRented]-[Rental]   Click OK. So...what did that do? Report Design Tools ->Design->Controls->Text Box Exam 77-885: Microsoft Access 2010 5. Designing Reports 5.2. Apply Report Design options: Add Bound and Unbound Controls