Yamaha 01X Supplementary Manual page 19

Recording/Playback/Remote Control
Undo
The [UNDO] button performs the same function as Undo
in the sequencer — allowing you to cancel the last edit
made and restore the previous condition of the song.
You can also execute Redo from the 01X. Simply hold
down the [SHIFT] button and press [UNDO]. The last edit
you made will be repeated, cancelling the just-made Undo.
Saving your song
You can also conveniently save your song from the 01X
panel, by simply pressing the [SAVE] button.
• For more information on the Remote Functions, refer to the Remote
Function List (page 104).
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01X Owner's Manual (Supplementary Manual)