Choose a bid from the bidding box, the bid will show at the top of the box, press the bid again to confirm. The bid will appear in the bidding area and it is the next person to make a bid.
Your own attitude shows in Yellow (in this example image N/S is yellow)
Once the bidding is finished, the contract shows on the table
Pressing the Contract button brings back the auction.
When playing the hand, press the card you want to play and press it again to play it. (pressing twice = to prevent playing the wrong card)
The trick on the table disappears when the next card is played.