Boss BR-1200CD Owner's Manual page 184

Creating bass patterns
9. Move the cursor to "Pattern" and use the TIME/VALUE
dial to select the bass pattern to which the data is to be
imported.
fig.04-1080c
It will not be possible to select preset bass patterns as
destinations for SMF import.
10. Press [F3] (GO).
Importing of the selected SMF will begin. When the
message "Complete!" appears, it indicates that the
import has been completed.
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