Grundig Stenorette St 3220 Manual Del Usuario página 37

HOW TO USE THE 536 FOOT CONTROL
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You can alter the short rewind time with the
"BACKSPACE" rotary adjuster in the base of the
machine. In the " + " position (maximum), the tape is
rewound as long as the pedal is held down.
– If the end of a letter is marked you will hear a short
beep and the tape will stop briefly
Keep the pedal pressed down if you wish to continue.
Stop Release the pedal.
– The following appears in the display:
STOP
min LETTER
15