In order to fit many controls on a tiny screen I needed to find a new way to interact with knobs and levers.
A few tips if you find it difficult to make precise adjustments:
1: Touch the control you wish to adjust. Red Arrows instruct you to slide your finger away from the center in order to attach your finder to the control.
2: You can slide your finger in any direction you want.
3: Your finger is attached when the red turn icon appears
4: Slide your finger around the control in order to adjust
TIP: The further away your finger is from the center, the more precise the adjustment.
Hopefully these illustrations help to make things clearer.