Boss Drive Zone OD-20 Owner's Manual page 11

Operation
4. Press the MEMORY WRITE button.
The write operation finishes after the MEMORY indicator and the indicator for the
write-destination memory have begun to blink more rapidly.
fig.14
Writing Write finished
Blink
Blink rapidly Lit
* To cancel the write operation, operate a knob or the MANUAL/MEMORY pedal before
you press the WRITE button.
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