To create a DropDown List from an existing book,

Display the Libraries & Books screen and select the book from which you wish to create a DropDown List.

The action box opens in the middle of the Libraries & Books screen. Click “Create DropDown List” option.

Click Next>>.

Create DropDown List from a book in a library.

If you want the DropDown List to comprise some, but not all, items in a particular book, create the List from the Clause Selection  Screen. That is discussed in the section that immediately follows.