Determines the behavior of the SHIFT foot switch:
M(omentary) SHIFT is only active while the switch is held down. Release to disengage.
L(atching) Press the switch to engage, press again to disengage. This is how most stomp switches work by default.
TAP Pressing the switch will set tap tempo in quarter notes for the delay time by default; use web editor, TouchOSC, or MIDI to sync modulation.