How can I set a selection-sphere in the editor

I have a gameobject in my unity editor.

It only has one component, which adds an “editor preview” as child-object.

The child object has .hideFlags = HideFlags.NotEditable | HideFlags.DontSave | HideFlags.HideInHierarchy | HideFlags.HideInHierarchy; set.

Problem

My object is not selectable in the scene view.

Can I do something like “AddSelectionCollider()” ??

Check out Handles. I believe you’ll need an editor script for the targeted script to use them.