Randomisation

Controlled variation on everything the channel plays.

Amount — how much variation; Off bypasses it. A tall slider, or a knob when the pane is short.
Recipe — what's varied, and how: pick from the list.
Mutate — Off holds the pattern; Low to High let it evolve as the loop goes round.
Re-Roll — a new seed, so a new pattern. The seed's tag under the recipe changes with it.
Amount, Mutate and Re-Roll take modulation and MIDI Learn.