When I import a graphic into my structured FM document, it centers the image. How can I modify the FrameMaker EDD to position anchored frames on the right by default?

 In the EDD, I changed the "align" attribute in my Image element from "string" to "choice" and defined a list of choices (left, center, or right). When I import a graphic, I set the attribute value to "right, but of course it doesn't affect the graphic position because I don't know how to define "right" for FrameMaker.