Roland Atelier AT-90SL Owner's Manual page 89

Chapter 2 Using Rhythm Performance
5.
Touch <Delete>.
The following display appears.
To cancel operation, touch <Cancel>.
6.
If you are sure that you wish to delete the rhythm, touch
<OK>.
When a rhythm is deleted, the deleted rhythm name will change to "- - - - -."
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Max Max Max Max
Min Min Min Min
Harmony Intelligence