Roland BK-9 Owner's Manual page 19

Press and hold Function
Opens the "Audio Key" page.
Opens the "Organ Commons" page.
Opens the "Super NATURAL Edit" page if the [Super
NATURAL] button lights.
Opens the "Chord Loop" page.
Pressing and holding one of the D-BEAM buttons
opens "D Beam" page.
Press and hold the desired PART ON/OFF button
([UPPER1], [UPPER2], [LOWER], [M. BASS]) to enable
the part where you want to change the tone.
The main page will show the selected part in
reverse.
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