Step Arpeggiator is a pattern-based arpeggiator. Program your custom pattern and it will play the notes of the chord according to the pattern.
You can save up to 16 patterns that will save with the live set, and you can store them on an external file to use it whenever you want. The patterns can be up to 32 steps long and up to 16 simultaneous notes.
In the matrix, you can select one or more cells to trigger a single note or a chord in every step. And with the lower row, you can select if you want to play the next or previous note, that way you can set the arpeggiator to "up" or "down" like any other arp.