The easiest way is to select your individual bets first. Then you will see an option for multiples(accumulator) at the bottom of your bet slip. It doesn't get any easier than that!
When placing accumulator bets, remember to play responsibly. It can be incredibly easy to get swayed by the promise of winning hundreds, if not thousands of pounds out of a tenner placed on the results of the next five Premier League matches. However, keep in mind that when one of these games does not go your way, you lose the entire bet.
Of course, if you're an expert at the sports you're betting on and use your advanced knowledge to place bets, then you can surely give accumulators a shot. Don't go placing wild accumulator bets for horse racing if you've never been to the track before, though!