SND On Air: How long do posts take to rotate?

For most users, controlling the playlist will be a manual operation. You can learn more about that, here.

If you want to push play and let the playlist run, you can set the auto-rotate speed in Template Settings under the Animations section. Here, you can select 4.5 seconds or 8.5 seconds. If you plan to manually control, it's best to set this to 8.5 seconds when building your template.