Drop-down boxes enable you to select from a list of valid options for a field. You can structure a User-Defined Field (UDF) so that it has a drop-down box attached, with a list of alternatives that you have defined.
To add a drop-down box
Select Char for the Data Type field in the Details(i) tab. This action enables you to edit the Drop-down items box in the Details (ii) tab.
Select the Details (ii) tab.
Click the Edit Items button. You will reach the User Defined Lookup window.
Enter the first choice for the drop-down box. Click Add.