Leckey Mygo Notice D'utilisation page 66

11.7 Adjusting the
Dynamic Backrest
To return the backrest to a static position,
loosen the handle (a), slide the backrest strut
to the bottom, retighten the handle.
The backrest must be in the upright
position with the dynamic function
locked off (i.e. the handle (a) to the
lowest position on the backrest supine)
and ensure the locking pin (c) is
engaged when the seating system is
used in transport.