Can't modify physics shapes

I can’t edit the physic shape in the editor with the gizmo, i can’t resize, move or rotate.
Did i miss something ?

You have to manipulate the collider shapes on the component property panel. Under the StaticCollider / RidgidBody / etc there is a sub-section for “Collider Shapes” that is not expanded by default. When you open it, you can change the size / position / rotation of the collision hulls. It’s a bit tedious, but, you have full control over the shapes.