Thanks, Kirk. I'm getting there. I've deleted the sample list of structured keywords and entered a new Parent word "Birds" in the first column. How do I now enter words in successive columns for subcategories? For example, if I want the Parent word to be "Birds," how do I enter "Water Birds" in the 2nd column, "Ducks" in the 3rd column, "Mallards" in the 4th column, etc.?