Switching drums on and off on the Boss RC-300.

With the old RC50 I believe you could switch the drums on and off when required but I couldn't find this feature on the RC-300. I hunted the internet looking for a solution to this and could not find anything, just loads of people asking the same question. I did a bit of a play around and discovered that you can actually do this quite simply. I hope this helps others out there who were struggling with this.