For each function call that changes input data, you can customize input data from both the Request view and the Form Data view. The Form Data view offers a convenient means of viewing and customizing all customizable form fields. The Form Data view is a representation of the forms section of the BDL script with all included name/value pairs.
Right-click a control and choose Customize Value (just as with Request view) to open the Parameter Wizard.
Controls for which user data has already been customized are displayed with a green outline.