When it is your turn to bid, 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.
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.
Press the Bidding Box button if you don't see the bidding box when it is your turn to bid.