This accessibility handicap (chicken <-> egg) begs another question: why
should anyone need to change it? Why doesn't the mouse pointer size adjust
automatically as screen pixel density is increased like text does? The system
that raised this question is 180 DPI, where the default pointer is all but
invisible to the eyes that routinely use it.
I expect to see something either under input devices ->
mouse, or somewhere in accessibility, but I see it in neither. Is some
special package needed?