Kia RIO Owner's Manual page 208

Features of your vehicle
Increase cargo space
(if equipped)
If you want to increase cargo space,
1. Grasp the handle on the top of the cover and lift it
2. Fold the rear part of the luggage tray board frontward
3. Lift the luggage tray board hinge and pull it to the end of sliding slot.
4. Rotate it downward and slide it frontward (refer to the above pictures)
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