@glyph at least what you mentioned about the dock reminded me that I *did* discover this previously and then foolishly did not document what I learned, but I have hopefully now atoned for this minor sin and moved the needle a wee bit.

I'm sure actually integrating the bodge I dropped in the issue would be a nightmare (how do you query that the dock is present, that it is vertical, which monitor it is on and how that is tied to geometry, etc.) but I tell myself it is okay to get part of the way there because it's all bodge as yet