1. This is the pile to draw cards. Tap on it to get a card. Alternatively, you can tap on the empty card icon on the right side of your hand. 

2. This is the discard pile. Here you can discard a card to end your turn. 

3. You can use this icon to sort the cards in your hand. 

4. Tap on your avatar to show a reaction to the other players.  

5. Here you can indicate to your fellow players when you have your "Last Card". Your selection will be confirmed by a check mark. 

6. You can use the menu to return to the main screen. It can be folded in and out by tapping on it.