Once a hand has been dealt, the remaining cards (2 or more) are passed face down to the player on the dealer's left who cuts the deck (or taps it if they wish to select the top card). The dealer turns up the top card, and the suit that comes up will be the trump suit for that hand. If the card that comes up is a Bluke (one of the 2 jokers), then there is no trump for that hand.