Question Unity EditorWindow scripting

HI, guys!
So, I want to create some sort of Scene in the Editor Window. I need to easier creating decorations for some rooms. So, how it must be looked. You have button "Generate Room" it generate room W x H size. Then you can drop prefabs in this "Scene" in the Editor Window and create this specific patterns of decoration.
So, I tried inherits from SceneView and create new Scene using : EditorSceneManager.NewScene(NewSceneSetup.EmptyScene, NewSceneMode.Single);
but when i did this, my main scene overlaps by this new scene.
Maybe, using Scene here not the best method.
Perhaps there is a better method to do this.
Thanks!