Camera in SceneView rotating on itself

Habitually, when I Drag&Drop with the right click, the camera in the SceneView rotates around the selected object.
I don’t know what i’ve done but now the Camera rotates on itself and I can’t find the tool to put it back !

Thank for your help.

That thing there, you clicked on the center cube and put it in perspective view. Click on one of the the things sticking out of the cube (where it says x/y/z) and then try your right-click rotating.

Yes, that might be the problem he/she is facing with, I believe. Would have used “Alt + left click”, instead.