Drag a dial up or right to raise it, or grab its blue arc and turn it round. Hold Shift for fine steps. Double-click to reset.
It is a keyframe timeline in a circle. On the outer rings, Motion and Look, a dial's place is when its effect is strongest. Each one glows as much as its effect is acting now: blue one way, amber the other.
The dotted inner circles, Timing and Material, are specs. They do not change over the loop, so they never glow. Arrange them however you like.
Drag a dial by its name to move it, or use ⌥← ⌥→. Turn a ring to move all its unlocked dials together. Locked dials hold their place.
The wave button in the bottom bar turns live dials on or off: each timeline dial acts out its own effect.
Drag the dotted timer round the outside to scrub. Space plays or pauses, ⌘Z undoes.