How to change the order of cards in a stack?
It's very easy to move cards with the mouse to change the order of cards in your stack - just click and drag to move them. Just make sure you have the setting 'Tablet/Mobile Mode (use touch to scroll)' set to OFF so that you do actually allow the mouse or your finger to drag a card (and not scroll).
You can also use the menu of the card in card thumbnail view to move cards up or down