There are two attached PowerPoint presentations here.
One ppt. is called "Making Carousels Work" and describes how you can set up a Poll to determine what your users see. This helps understand what you can do when your users might be on different screen sizes, rations, and resolutions. (There is a "blue ruler.png" for you to use - should you decide to follow the instructions and set up that Poll.)
The second .ppt is called "Carousel Education" and is designed just to quickly illustrate a very specific situation: What will the carousel look like in relationship to other islands if you FORCE a specific height?
Please reach out to your CSM or to OnSemble Education for a personal walk-through!