Mixstream Pro BPM adjust

Hi all,

Just dusted off my Mixstream Pro after a couple months away from it and for the life of me I cant remember how you change the BPM on a track, i.e. from 80 to 160 bpm (usually for D&B or faster Hardcore\Hardstyle etc).

Sure its something like shift and another button but completely stumped and cant find the info on here where i originally found out you can do that.