Carousel slides within Cover Pages can easily be re-ordered so that you can control which slides appear first, second, etc. 

  1. Navigate to your Cover page with the Carousel that you want to modify.
  2. Click Compose in the Green Edit Bar:
  3.  Click Edit on the carousel you want to re-order.
  4. Click and drag on the carousel images to re-order them.
  5. Click Save.