Oh BY THE WAY Wendellm, You incorrectly labeled your diagrams
you say that your pic of pillar boxing is window boxing
an example of window boxing is not shown in your diagram
you say that your pic of pillar boxing is window boxing
an example of window boxing is not shown in your diagram
Thanks for that; you're indeed right.
I've corrected that reference and my text references above from "window" to "pillar."