The 4-Button Footswitch (Part#0080996000) has three modes which are identified by the three LEDs labeled MODE 1, MODE 2 and MODE 3, as well as a Tuner mode which is indicated when all mode LEDs are off. To switch between modes, press the MODE button. To activate Tuner mode, press and hold the MODE button.
TWO-BUTTON PEDAL (0080997000)
Connect a 2-button footswitch to your Mustang amplifier (included with Mustang III, optional equipment for Mustang IV & V) to enable remote multi-function foot control. Use the Utility menus to assign any of the following functions to the 2-button footswitch:
Select presets (high/low)
Select Quick Access Presets (QA1/QA2)
Circumvent effects (various combinations)
Set TAP interval