How Do You Populate a Drop-Down List?



I am trying to creat a form with pull down menus where a user can select one item in a drop-down list.

After converting a word document to a PDF document using Adobe Acrobat 8, I used the form button to create a form using LiveCycle. I can't figure out how to populat these pull down menus from the library. I wouls also like to know how to add a text field that the user can use for general comments.