Roland DR-880 Owner's Manual page 34

Playing your guitar/bass along with patterns
* If you turn the VALUE dial while holding down [SHIFT], the
patch number will change in steps of ten.
* You can hold down [SHIFT] and press [EFFECT] to switch
between preset (P) and user (U).
* Each time you press [EFFECT], the effect will turn on (button lit)
or off (button unlit).
• For more details on the effect patches, refer to p. 43.
• For more on the Preset patches, refer to p. 155.
• When you want to make changes to the Effect patch
settings, refer to "Editing an effect patch (Patch Edit)"
(p. 86).
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