Sometimes, especially after taking a break or after adding a lot of new cards in one go, you can find yourself with way too many flashcards to review.
That is ok, it doesn’t mean that you should review all those flashcards right away (although you can). You can just review however many you’re comfortable with every day, and slowly get back to a managable number over time.
To make this easier, you will now find a "Rebalance" button in the flashcard overview. It gives you a choice of number of desired reviews per day, and your current reviews will be spread out. You can use this whenever your current number of flashcards is too high.