We have an extensive library of Freemason books going back hundreds of years and we need to document them as Assets.  Many of the books are written by the same author over the years and published by publishers that specialize in these kinds of books; but many are unique.  I would like to have a combo box that selects but can also add new data. How do I do this in my form to enter books?  I think it is an issue of Bound Column and Limit to list properties of the field but Ive tried different combinations and it still has errors.