Nissan X-Trail 2024 Owners Manual
4.17.11.1. Two-stage mode

Pull the rear board upward (1) to approximately 30°.
Pull the rear board toward the rear of the vehicle (2) and then push it into the bottom of the luggage under space (3).
Pull up the front (inner) board and push it into the bottom of the luggage under space in the same way (4).
Owners Manual