Dürkopp Adler 827 Operating Instructions Manual page 29

LED
5 and 6 Display for empty bobbin with residual thread monitor
(left/ right bobbin)
8 LED display "power on"
The function of key 7 can be selected with the screw4 underneath the
key 3.
–
Selecting a function.
Example: 3 = Manually sewing backward.
–
Turn in the screw 4 underneath the key 3 and turn it 90° to the
right (the slot stands vertically).
The function can now be called via both keys 3 and 7.
CAUTION!
Before key 7 can be programmed with a new function, the former
setting must be deactivated.
Function
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