If you are studying a deck, and come across a card you don't want to learn right now, you can ignore it, by following these steps:
- During Review, open the menu (accessible by clicking "hamburger" icon in the top-right corner).
- Click the "Ignore" menu option. The icon will turn red, indicating the card is now ignored.
If you later decide you want to un-ignore the card, follow these steps:
- From the Decks screen, open the menu.
- Click the "Cards" menu option.
- Find the ignored card and tap/click on it.
- Click the Un-Ignore button.