Ducati MULTISTRADA 620 Manuel D'utilisation Et Entretien page 132

Rear view mirror adjustment
Simply push or pull the outside of the mirrors in the
direction needed to obtain optimum visibility (fig. 32).
Tighten the screw at the bottom of the mounting to
lock the mirror in the required position (fig. 32a).
E
fig. 32
fig. 32a
39