Pfaff 3588-04/020 Instruction Manual page 75

Input mode functions
Reference point for coordinates (number key 6)
Sets the coordinates in the display to "0", thus creating a new reference point.
Delete (number key 8)
Deletes the current section.
Change (number key 9)
Allows you to modify the current section.
Activate Insert (number key 0)
Allows you to switch between the Insert and Initial state mode.
When the function is switched off, Initial state is active.
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