Collections are an easy way to set up a series of maps together so that you can reference all of them when needed.  Pre-set collections are available for midday model updates as well as tropical updates, and if you purchase the midday predictor add-on, you can also get the midday predictor collection.  Adding maps to collections are easy- just click the “collection” box on the upper right above the map selected.  You can add or remove to a list or create a new list in the options that populate once hitting the button.  You can find your collections under the Personal menu along top of page.