Quote:What I would like to know: is there an easy way to either get a list of all the XY coordinates of all pixels in a particular selection or, barring that, get the XY coordinates of all the pixels on a given layer?
I don't see where you want to go with "particular selection". You have multiple selection?
Or you want every coordinate of every single pixel?
What do you want to achieve by doing so?
Please give us a bigger "picture" about what you would really like to do.
Speaking about XY https://xyproblem.info/
(thanks to Ofnuts for that link)