
Free placement
Press U and aim at any surface. Sit or lie down on the ground, grass, curbs, wall tops, ledges and parked vehicles, or lean on any wall or vehicle.
Overview
Chairs and benches work through the target eye, and any wall, ledge or vehicle works by aiming at it. An in-game editor adjusts the position.
Features

Press U and aim at any surface. Sit or lie down on the ground, grass, curbs, wall tops, ledges and parked vehicles, or lean on any wall or vehicle.

Every animation is set on the surface by the real pose of the character, on slopes too, so the body does not sink in or float.

Legs crossed, hands together, on the phone, smoking, coffee, beer. Held items appear in the hand.

Drag arrows to move the player, drag a ring to rotate, turn the camera with the right mouse button.
Before you buy
Install
ensure ox_lib
ensure qb-target
ensure mlr-sitHelp
Put ensure ox_lib above ensure mlr-sit in server.cfg.
Another resource may use the same key. Rebind it in the FiveM key settings or change Config.FreePlace.key, then press F8 and look for errors.
The hint on the left tells why: too far away, too high to reach, not enough room, or something in the way.
Raise Config.FreePlace.leanBackDepth a little, for example 0.26.
Keep going