Changing all my mesh in my scene as the same prefab without re-positioning ?

I created a scene with a mesh that I dupplicated a lots of time, with a precise rotation and a precise position

How can I change them as a prefab without re-positioning all the objects ?

Hello.

There is a “trick” that i use.

The thing to know is:

If while playing in editor mode, you select the objects in the hicheracy and press Crtl+C (Copy) Then press stop the play mode.

Then in the hicheracy, delete all the obejcts you copied, and press Crtl+V (Paste) The objects will paste in the position and rotation that had when copied them in play mode.

Understand? Try it and give feedback!