Kawai CN29 Owner's Manual page 31

 Selecting a Lesson book and song
While Lesson mode is enabled:
Press the [UP] or [DOWN] buttons to select the desired Lesson
book.
Press the [1] function button (ENTER) to confirm the selected
Lesson book.
Press the [UP] or [DOWN] buttons to select the desired Lesson
song.
* The Beyer lesson book includes 106 exercises. Exercise no.1 consists
of 12 variations, while exercise no.2 consists of 8 variations.
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