Editor Script Points

I want to be able to click a button on the inspector and add a new point to the Scene. Then move around an array of points to a certain layout, then run the game and have it use those points for various features. I've searched for about 4 hours on how to do this, including watching tutorials for editor scripts, looking at examples, etc.

Please remember, I would like this all done from the Inspector

• How to add a point to the game

• Should this be an empty game object, or some gizmo

• how to move said-point without running the game

• how to pass the information at, or before runtime to a script that needs it

thanks for any help you can give!