Use the Assignment command to assign a constant value or the value of a field or variable to another field or variable.
Using the Boolean constant in the Assignment command
In the Rule Command - New window, select the Assignment command.
In the Parameters section, select the Source parameter by clicking the up arrow to the right of the Source parameter text box. A menu displays the Memory Variable, Record/Field, System Variable, Constant, Parameter, and Boolean Constant options.
Select the Boolean Constant option.
Select the True or False option from the menu that displays when you click Boolean Constant.