Sketch of the formation of the jet and transfer of the twist from the FR to the jet during reconnection. Panel a: magnetic configuration before the reconnection, panel b: formation of the BP current sheet, panel c: X-point current sheet, panel d: untwisting jet after the reconnection and the remnant twist in the bipole JP1 and JN2. The dashed lines represent the non-eruptive FR, the arcade between P1 and N2 (dashed line in (a)) reconnects at the BP with the dashed line on the right in (b) creating a long dashed field lines from P1 to the extreme right. Below the arcade, the twisted line P1-N2 of FR (solid line) is elongated in (b) and touches the BP region in (c), it reconnects with an open magnetic field line (solid line on the right in (c)) creating the untwisting jet in (d).