How do I save a preset after editing it in LIVE mode?
After adjusting your parameters in LIVE mode, tap BANK- or BANK+ to select the desired BANK, then hold the A, B, C, or D footswitch to save the preset to that slot. The A/B/C/D footswitch will blink quickly to indicate 'Save successfully.'
From the official M Vave Vave Tank G Multi Guitar Pedal manual, page 8
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