Model elements must be named using an alpha-numeric format. The naming of model elements can be done using combinations of “Aa-Zz” “0-9” and “_”, the underscore character. How content is named in Photoshop will be maintained when it is brought into Storyboard. When duplicate naming occurs, controls and files in the project image directory will then include numeric values with the name, e.g., “image.png” “image1.png” image2.png”