Inserting an masked control
1 Open a Look to modify.
2 Position the cursor where you want to place the masked control.
3 Click the Microsoft Office Button, and then click Word Options.
4 Click Popular, and then select the Show Developer tab in the Ribbon check box.
5 From the Word Developer tab, click the Legacy Tools icon in the Controls group, and then click the More Controls icon. This opens the More Controls dialog.
6 To create a character field for numeric responses, click Masked Numeric Control on the Object Type list.
7 To create a character field for open-ended responses, click Masked Text Control on the Object Type list.
8 Click OK.
Word inserts the control into your document.
See also