How do u do multiples on the I phone betfair app???

Hi - reply from the Multiples team: "The latest Iphone App hosts the new Multiples bet-slip. Customers can place Multiples bets on events with the letter M attached, and selecting the Multiples option on the bet-slip"

Icant see many M,s on the horse racing is that correct and can you not use ipad for multiple bets . Its all a bit baffling to me or perhaps i,m not up to using the new site :-(