To assign a value to a screen, COMMAREA, or work field

From the Interface Mapper Assignments pane, right-click, then click New Assignment from the popup menu.
From the Assign to drop-down list, click the field to which you want to assign a value.
In the Field 1/Operand 1 field, do one of the following:
- To assign a field value, click a field name from the drop-down list
- To assign a numeric or non-numeric literal value, type the value into the field
Click OK.

Note:

Fields that are part of an array appear on the Field/Operand drop-down lists with a subscript. The default subscript is the total number of occurrences of the field. To specify a specific occurrence, edit the subscript in the Field/Operand field. If you want to specify all occurrences, type an asterisk (*) as the subscript.
Any condition defined for the assignment appears in the Assignment Condition box at the bottom of the Assignment dialog box.