Maybe I'm missing it...but how do you put a turntable into "pre-cue" in the iPhone app?

The iPad version of dJay has nice little headphone icons below the pitch sliders. Obviously, there’s less screen real estate on the iPhone so no icons. That’s fine - but how do you access pre-cueing without having to resort to using an external controller? TIA for your help!

Never mind…figured it out. It’s tied to the crossfader.